UP read me

.gitignore

@@ -8,3 +8,6 @@ target
 *.iml
 *~
 pairgoth.db
+ratings
+pairgoth
+pairgoth.tar.gz

README.md

@@ -1,3 +1,5 @@
+# This is largely a mirror of the original, adapted for the Slovenian Go Association.
+
 # Pairgoth
 
 Welcome to Pairgoth, your Go Pairing Engine!

api-webapp/src/main/kotlin/org/jeudego/pairgoth/api/ApiTools.kt

@@ -7,61 +7,23 @@ import org.jeudego.pairgoth.model.MacMahon
 import org.jeudego.pairgoth.model.Pairable
 import org.jeudego.pairgoth.model.PairingType
 import org.jeudego.pairgoth.model.Player
+import org.jeudego.pairgoth.model.TeamTournament
 import org.jeudego.pairgoth.model.Tournament
 import org.jeudego.pairgoth.model.getID
 import org.jeudego.pairgoth.model.historyBefore
 import org.jeudego.pairgoth.pairing.HistoryHelper
 import org.jeudego.pairgoth.pairing.solver.MacMahonSolver
-import kotlin.math.floor
 import kotlin.math.max
 import kotlin.math.min
-import kotlin.math.round
-
-//  TODO CB avoid code redundancy with solvers
 
 fun Tournament<*>.getSortedPairables(round: Int, includePreliminary: Boolean = false): List<Json.Object> {
 
-    fun Pairable.mmBase(): Double {
-        if (pairing !is MacMahon) throw Error("invalid call: tournament is not Mac Mahon")
-        return min(max(rank, pairing.mmFloor), pairing.mmBar) + MacMahonSolver.mmsZero + mmsCorrection
-    }
-
-    fun roundScore(score: Double): Double {
-        val epsilon = 0.00001
-        // Note: this works for now because we only have .0 and .5 fractional parts
-        return if (pairing.pairingParams.main.roundDownScore) floor(score + epsilon)
-        else round(2 * score) / 2
-    }
-
     if (frozen != null) {
         return ArrayList(frozen!!.map { it -> it as Json.Object })
     }
 
-    // CB TODO - factorize history helper creation between here and solver classes
-    val historyHelper = HistoryHelper(historyBefore(round + 1)) {
-        if (pairing.type == PairingType.SWISS) {
-            pairables.mapValues {
-                Pair(0.0, wins[it.key] ?: 0.0)
-            }
-        }
-        else {
-            pairables.mapValues {
-                it.value.let { pairable ->
-                    val mmBase = pairable.mmBase()
-                    val score = roundScore(mmBase +
-                            (nbW(pairable) ?: 0.0) +
-                            (1..round).map { round ->
-                                if (playersPerRound.getOrNull(round - 1)?.contains(pairable.id) == true) 0.0 else 1.0
-                            }.sum() * pairing.pairingParams.main.mmsValueAbsent)
-                    Pair(
-                        if (pairing.pairingParams.main.sosValueAbsentUseBase) mmBase
-                        else roundScore(mmBase + round/2),
-                        score
-                    )
-                }
-            }
-        }
-    }
+    val history = historyHelper(round + 1)
+
     val neededCriteria = ArrayList(pairing.placementParams.criteria)
     if (!neededCriteria.contains(Criterion.NBW)) neededCriteria.add(Criterion.NBW)
     if (!neededCriteria.contains(Criterion.RATING)) neededCriteria.add(Criterion.RATING)
@@ -72,24 +34,24 @@ fun Tournament<*>.getSortedPairables(round: Int, includePreliminary: Boolean = f
             Criterion.CATEGORY -> StandingsHandler.nullMap
             Criterion.RANK -> pairables.mapValues { it.value.rank }
             Criterion.RATING -> pairables.mapValues { it.value.rating }
-            Criterion.NBW -> historyHelper.wins
-            Criterion.MMS -> historyHelper.mms
-            Criterion.SCOREX -> historyHelper.scoresX
+            Criterion.NBW -> history.wins
+            Criterion.MMS -> history.mms
+            Criterion.SCOREX -> history.scoresX
             Criterion.STS -> StandingsHandler.nullMap
             Criterion.CPS -> StandingsHandler.nullMap
 
-            Criterion.SOSW -> historyHelper.sos
-            Criterion.SOSWM1 -> historyHelper.sosm1
-            Criterion.SOSWM2 -> historyHelper.sosm2
-            Criterion.SODOSW -> historyHelper.sodos
-            Criterion.SOSOSW -> historyHelper.sosos
-            Criterion.CUSSW -> if (round == 0) StandingsHandler.nullMap else historyHelper.cumScore
-            Criterion.SOSM -> historyHelper.sos
-            Criterion.SOSMM1 -> historyHelper.sosm1
-            Criterion.SOSMM2 -> historyHelper.sosm2
-            Criterion.SODOSM -> historyHelper.sodos
-            Criterion.SOSOSM -> historyHelper.sosos
-            Criterion.CUSSM -> historyHelper.cumScore
+            Criterion.SOSW -> history.sos
+            Criterion.SOSWM1 -> history.sosm1
+            Criterion.SOSWM2 -> history.sosm2
+            Criterion.SODOSW -> history.sodos
+            Criterion.SOSOSW -> history.sosos
+            Criterion.CUSSW -> if (round == 0) StandingsHandler.nullMap else history.cumScore
+            Criterion.SOSM -> history.sos
+            Criterion.SOSMM1 -> history.sosm1
+            Criterion.SOSMM2 -> history.sosm2
+            Criterion.SODOSM -> history.sodos
+            Criterion.SOSOSM -> history.sosos
+            Criterion.CUSSM -> history.cumScore
 
             Criterion.SOSTS -> StandingsHandler.nullMap
 
@@ -100,14 +62,14 @@ fun Tournament<*>.getSortedPairables(round: Int, includePreliminary: Boolean = f
             Criterion.DC -> StandingsHandler.nullMap
         }
     }
-    val pairables = pairables.values.filter { includePreliminary || it.final }.map { it.toDetailedJson() }
-    pairables.forEach { player ->
+    val jsonPairables = pairables.values.filter { includePreliminary || it.final }.map { it.toDetailedJson() }
+    jsonPairables.forEach { player ->
         for (crit in criteria) {
             player[crit.first] = crit.second[player.getID()] ?: 0.0
         }
         player["results"] = Json.MutableArray(List(round) { "0=" })
     }
-    val sortedPairables = pairables.sortedWith { left, right ->
+    val sortedPairables = jsonPairables.sortedWith { left, right ->
         for (crit in criteria) {
             val lval = left.getDouble(crit.first) ?: 0.0
             val rval = right.getDouble(crit.first) ?: 0.0
@@ -129,15 +91,16 @@ fun Tournament<*>.getSortedPairables(round: Int, includePreliminary: Boolean = f
     return sortedPairables
 }
 
-fun Tournament<*>.populateStandings(sortedPairables: List<Json.Object>, round: Int = rounds) {
-    val sortedMap = sortedPairables.associateBy {
+fun Tournament<*>.populateStandings(sortedEntries: List<Json.Object>, round: Int = rounds, individualStandings: Boolean) {
+    val sortedMap = sortedEntries.associateBy {
         it.getID()!!
     }
 
     // refresh name, firstname, club and level
+    val refMap = if (individualStandings) players else pairables
     sortedMap.forEach { (id, pairable) ->
         val mutable = pairable as Json.MutableObject
-        pairables[id]?.let {
+        refMap[id]?.let {
             mutable["name"] = it.name
             if (it is Player) {
                 mutable["firstname"] = it.firstname
@@ -150,7 +113,8 @@ fun Tournament<*>.populateStandings(sortedPairables: List<Json.Object>, round: I
 
     // fill result
     for (r in 1..round) {
-        games(r).values.forEach { game ->
+        val roundGames = if (individualStandings) individualGames(r) else games(r)
+        roundGames.values.forEach { game ->
             val white = if (game.white != 0) sortedMap[game.white] else null
             val black = if (game.black != 0) sortedMap[game.black] else null
             val whiteNum = white?.getInt("num") ?: 0
@@ -186,3 +150,54 @@ fun Tournament<*>.populateStandings(sortedPairables: List<Json.Object>, round: I
         }
     }
 }
+
+fun TeamTournament.getSortedTeamMembers(round: Int, includePreliminary: Boolean = false): List<Json.Object> {
+
+    val teamGames = historyBefore(round + 1)
+    val individualHistory = teamGames.map { roundTeamGames ->
+        roundTeamGames.flatMap { game ->  individualGames[game.id]?.toList() ?: listOf() }
+    }
+    val historyHelper = HistoryHelper(individualHistory).apply {
+        scoresFactory = { wins }
+    }
+    val neededCriteria = mutableListOf(Criterion.NBW, Criterion.RATING)
+    val criteria = neededCriteria.map { crit ->
+        crit.name to when (crit) {
+            Criterion.NBW -> historyHelper.wins
+            Criterion.RANK -> pairables.mapValues { it.value.rank }
+            Criterion.RATING -> pairables.mapValues { it.value.rating }
+            else -> null
+        }
+    }
+    val jsonPlayers = players.values.filter { includePreliminary || it.final }.map { it.toDetailedJson() }
+    jsonPlayers.forEach { player ->
+        for (crit in criteria) {
+            player[crit.first] = crit.second?.get(player.getID()) ?: 0.0
+        }
+        player["results"] = Json.MutableArray(List(round) { "0=" })
+    }
+    val sortedPlayers = jsonPlayers.sortedWith { left, right ->
+        for (crit in criteria) {
+            val lval = left.getDouble(crit.first) ?: 0.0
+            val rval = right.getDouble(crit.first) ?: 0.0
+            val cmp = lval.compareTo(rval)
+            if (cmp != 0) return@sortedWith -cmp
+        }
+        return@sortedWith 0
+    }.mapIndexed() { i, obj ->
+        obj.set("num", i+1)
+    }
+    var place = 1
+    sortedPlayers.groupBy { p ->
+        Triple(
+            criteria.getOrNull(0)?.first?.let { crit -> p.getDouble(crit) ?: 0.0 } ?: 0.0,
+            criteria.getOrNull(1)?.first?.let { crit -> p.getDouble(crit) ?: 0.0 } ?: 0.0,
+            criteria.getOrNull(2)?.first?.let { crit -> p.getDouble(crit) ?: 0.0 } ?: 0.0
+        )
+    }.forEach {
+        it.value.forEach { p -> p["place"] = place }
+        place += it.value.size
+    }
+
+    return sortedPlayers
+}

api-webapp/src/main/kotlin/org/jeudego/pairgoth/api/ExplainHandler.kt

@@ -0,0 +1,68 @@
+package org.jeudego.pairgoth.api
+
+import com.republicate.kson.Json
+import com.republicate.kson.toJsonArray
+import com.republicate.kson.toJsonObject
+import org.jeudego.pairgoth.api.ApiHandler.Companion.badRequest
+import org.jeudego.pairgoth.model.toJson
+import org.jeudego.pairgoth.pairing.solver.CollectingListener
+import javax.servlet.http.HttpServletRequest
+import javax.servlet.http.HttpServletResponse
+
+object ExplainHandler: PairgothApiHandler {
+
+    override fun get(request: HttpServletRequest, response: HttpServletResponse): Json? {
+        val tournament = getTournament(request)
+        val round = getSubSelector(request)?.toIntOrNull() ?: badRequest("invalid round number")
+        if (round > tournament.lastRound() + 1) badRequest("invalid round: previous round has not been played")
+        val paired = tournament.games(round).values.flatMap {
+            listOf(it.black, it.white)
+        }.filter {
+            it != 0
+        }.map {
+            tournament.pairables[it] ?: throw Error("Unknown pairable ID: $it")
+        }
+        val games = tournament.games(round).map { it.value }.toList()
+        // build the scores map by redoing the whole pairing
+        tournament.unpair(round)
+        val history = tournament.historyHelper(round)
+        val weightsCollector = CollectingListener()
+        tournament.pair(round, paired, false, weightsCollector)
+        val weights = weightsCollector.out
+        // Since weights are generally in two groups towards the min and the max,
+        // compute the max of the low group ("low") and the min of the high group ("high")
+        // to improve coloring.
+        // Total weights axis:
+        // ----[min]xxxx[low]----[middle]----[high]xxxx[max]---->
+        val min = weights.values.minOfOrNull { it.values.sum() } ?: 0.0
+        val max = weights.values.maxOfOrNull { it.values.sum() } ?: 0.0
+        val middle = (max - min) / 2.0
+        val low = weights.values.map { it.values.sum() }.filter { it < middle }.maxOrNull() ?: middle
+        val high = weights.values.map { it.values.sum() }.filter { it > middle }.minOrNull() ?: middle
+        val ret = Json.Object(
+            "paired" to paired.sortedByDescending { 1000 * (history.scores[it.id] ?: 0.0) + (history.sos[it.id] ?: 0.0) }.map {
+                it.toMutableJson().apply {
+                    put("score", history.scores[it.id])
+                    put("wins", history.wins[it.id])
+                    put("sos", history.sos[it.id])
+                    put("dudd", history.drawnUpDown[it.id])
+                }
+            }.toJsonArray(),
+            // "games" to games.map { it.toJson() }.toJsonArray(),
+            "games" to games.associateBy { "${it.white}-${it.black}" }.mapValues { it.value.toJson() }.toJsonObject(),
+            "weights" to weights.entries.map { (key, value) ->
+                Pair(
+                    "${key.first}-${key.second}",
+                    value.also {
+                        it.put("total", it.values.sum())
+                    }
+                )
+            }.toJsonObject(),
+            "min" to min,
+            "low" to low,
+            "high" to high,
+            "max" to max
+        )
+        return ret
+    }
+}

api-webapp/src/main/kotlin/org/jeudego/pairgoth/api/PairingHandler.kt

@@ -13,7 +13,10 @@ import org.jeudego.pairgoth.model.Tournament
 import org.jeudego.pairgoth.model.getID
 import org.jeudego.pairgoth.model.toID
 import org.jeudego.pairgoth.model.toJson
+import org.jeudego.pairgoth.pairing.solver.LoggingListener
 import org.jeudego.pairgoth.server.Event.*
+import java.io.FileWriter
+import java.io.PrintWriter
 import javax.servlet.http.HttpServletRequest
 import javax.servlet.http.HttpServletResponse
 
@@ -67,7 +70,15 @@ object PairingHandler: PairgothApiHandler {
                     if (playing.contains(it.id)) badRequest("pairable #$id already plays round $round")
                 } ?: badRequest("invalid pairable id: #$id")
             }
-        val games = tournament.pair(round, pairables)
+
+        // POST pair/$round accepts a few parameters to help tests
+        val legacy = request.getParameter("legacy")?.toBoolean() ?: false
+        val weightsLogger = request.getParameter("weights_output")?.let {
+            val append = request.getParameter("append")?.toBoolean() ?: false
+            LoggingListener(PrintWriter(FileWriter(it, append)))
+        }
+
+        val games = tournament.pair(round, pairables, legacy, weightsLogger)
 
         val ret = games.map { it.toJson() }.toJsonArray()
         tournament.dispatchEvent(GamesAdded, request, Json.Object("round" to round, "games" to ret))

api-webapp/src/main/kotlin/org/jeudego/pairgoth/api/StandingsHandler.kt

@@ -6,6 +6,7 @@ import org.jeudego.pairgoth.model.Criterion
 import org.jeudego.pairgoth.model.Criterion.*
 import org.jeudego.pairgoth.model.ID
 import org.jeudego.pairgoth.model.PairingType
+import org.jeudego.pairgoth.model.TeamTournament
 import org.jeudego.pairgoth.model.Tournament
 import org.jeudego.pairgoth.model.adjustedTime
 import org.jeudego.pairgoth.model.displayRank
@@ -27,10 +28,18 @@ object StandingsHandler: PairgothApiHandler {
     override fun get(request: HttpServletRequest, response: HttpServletResponse): Json? {
         val tournament = getTournament(request)
         val round = getSubSelector(request)?.toIntOrNull() ?: tournament.rounds
-        val includePreliminary = request.getParameter("include_preliminary")?.let { it.toBoolean() } ?: false
+        val includePreliminary = request.getParameter("include_preliminary")?.toBoolean() ?: false
 
-        val sortedPairables = tournament.getSortedPairables(round, includePreliminary)
-        tournament.populateStandings(sortedPairables, round)
+        val individualStandings = tournament is TeamTournament &&
+                tournament.type.individual &&
+                request.getParameter("individual_standings")?.toBoolean() == true
+
+        val sortedEntries = if (individualStandings) {
+            tournament.getSortedTeamMembers(round)
+        } else {
+            tournament.getSortedPairables(round, includePreliminary)
+        }
+        tournament.populateStandings(sortedEntries, round, individualStandings)
 
         val acceptHeader = request.getHeader("Accept") as String?
         val accept = acceptHeader?.substringBefore(";")
@@ -44,7 +53,7 @@ object StandingsHandler: PairgothApiHandler {
             PrintWriter(OutputStreamWriter(response.outputStream, encoding))
         }
         return when (accept) {
-            "application/json" -> sortedPairables.toJsonArray()
+            "application/json" -> sortedEntries.toJsonArray()
             "application/egf" -> {
                 response.contentType = "text/plain;charset=${encoding}"
                 val neededCriteria = ArrayList(tournament.pairing.placementParams.criteria)
@@ -52,19 +61,19 @@ object StandingsHandler: PairgothApiHandler {
                 if (neededCriteria.first() == SCOREX) {
                     neededCriteria.add(1, MMS)
                 }
-                exportToEGFFormat(tournament, sortedPairables, neededCriteria, writer)
+                exportToEGFFormat(tournament, sortedEntries, neededCriteria, writer)
                 writer.flush()
                 return null
             }
             "application/ffg" -> {
                 response.contentType = "text/plain;charset=${encoding}"
-                exportToFFGFormat(tournament, sortedPairables, writer)
+                exportToFFGFormat(tournament, sortedEntries, writer)
                 writer.flush()
                 return null
             }
             "text/csv" -> {
                 response.contentType = "text/csv;charset=${encoding}"
-                exportToCSVFormat(tournament, sortedPairables, writer)
+                exportToCSVFormat(tournament, sortedEntries, writer)
                 writer.flush()
                 return null
             }
@@ -123,7 +132,7 @@ ${
             player.getString("num")!!.padStart(4, ' ')
         } ${
             "${
-                player.getString("name")?.toSnake(true)
+                player.getString("name")?.toSnake()
                 
             } ${
                 player.getString("firstname")?.toSnake() ?: ""

api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairing.kt

@@ -4,8 +4,10 @@ import com.republicate.kson.Json
 import org.jeudego.pairgoth.api.ApiHandler.Companion.badRequest
 import org.jeudego.pairgoth.model.MainCritParams.SeedMethod.SPLIT_AND_SLIP
 import org.jeudego.pairgoth.model.PairingType.*
-import org.jeudego.pairgoth.pairing.solver.BaseSolver
+import org.jeudego.pairgoth.pairing.HistoryHelper
+import org.jeudego.pairgoth.pairing.solver.Solver
 import org.jeudego.pairgoth.pairing.solver.MacMahonSolver
+import org.jeudego.pairgoth.pairing.solver.PairingListener
 import org.jeudego.pairgoth.pairing.solver.SwissSolver
 import kotlin.math.min
 
@@ -131,28 +133,22 @@ sealed class Pairing(
     val pairingParams: PairingParams,
     val placementParams: PlacementParams) {
     companion object {}
-    abstract fun solver(tournament: Tournament<*>, round: Int, pairables: List<Pairable>): BaseSolver
-    fun pair(tournament: Tournament<*>, round: Int, pairables: List<Pairable>): List<Game> {
-        return solver(tournament, round, pairables).pair()
+    internal abstract fun solver(tournament: Tournament<*>, round: Int, pairables: List<Pairable>): Solver
+    internal fun pair(tournament: Tournament<*>, round: Int, pairables: List<Pairable>, legacyMode: Boolean = false, listener: PairingListener? = null): List<Game> {
+        return solver(tournament, round, pairables)
+            .also { solver ->
+                solver.legacyMode = legacyMode
+                listener?.let {
+                    solver.pairingListener = listener
+                }
+            }
+            .pair()
     }
 }
 
 internal fun Tournament<*>.historyBefore(round: Int) =
     (1 until min(round, lastRound() + 1)).map { games(it).values.toList() }
 
-/*private fun Tournament<*>.historyBefore(round: Int) : List<List<Game>> {
-    println("Welcome to tournament.historyBefore !")
-    println("lastround and round = "+lastRound().toString()+"   "+round.toString())
-    println((1 until round).map { it })
-    println((1 until round).map { games(it).values.toList() })
-    if (lastRound() == 1){
-        return emptyList()
-    }
-    else {
-        return (1 until round).map { games(it).values.toList() }
-    }
-}*/
-
 class Swiss(
     pairingParams: PairingParams = PairingParams(
         base = BaseCritParams(),
@@ -175,7 +171,7 @@ class Swiss(
 ): Pairing(SWISS, pairingParams, placementParams) {
     companion object {}
     override fun solver(tournament: Tournament<*>, round: Int, pairables: List<Pairable>) =
-        SwissSolver(round, tournament.rounds, tournament.historyBefore(round), pairables, tournament.pairables, pairingParams, placementParams, tournament.usedTables(round))
+        SwissSolver(round, tournament.rounds, HistoryHelper(tournament.historyBefore(round)), pairables, tournament.pairables, pairingParams, placementParams, tournament.usedTables(round))
 }
 
 class MacMahon(
@@ -203,14 +199,14 @@ class MacMahon(
 ): Pairing(MAC_MAHON, pairingParams, placementParams) {
     companion object {}
     override fun solver(tournament: Tournament<*>, round: Int, pairables: List<Pairable>) =
-        MacMahonSolver(round, tournament.rounds, tournament.historyBefore(round), pairables, tournament.pairables, pairingParams, placementParams, tournament.usedTables(round), mmFloor, mmBar)
+        MacMahonSolver(round, tournament.rounds, HistoryHelper(tournament.historyBefore(round)), pairables, tournament.pairables, pairingParams, placementParams, tournament.usedTables(round), mmFloor, mmBar)
 }
 
 class RoundRobin(
     pairingParams: PairingParams = PairingParams(),
     placementParams: PlacementParams = PlacementParams(Criterion.NBW, Criterion.RATING)
 ): Pairing(ROUND_ROBIN, pairingParams, placementParams) {
-    override fun solver(tournament: Tournament<*>, round: Int, pairables: List<Pairable>): BaseSolver {
+    override fun solver(tournament: Tournament<*>, round: Int, pairables: List<Pairable>): Solver {
         TODO("not implemented")
     }
 }

api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Tournament.kt

@@ -7,7 +7,9 @@ import com.republicate.kson.toJsonObject
 //import kotlinx.datetime.LocalDate
 import java.time.LocalDate
 import org.jeudego.pairgoth.api.ApiHandler.Companion.badRequest
-import org.jeudego.pairgoth.api.ApiHandler.Companion.logger
+import org.jeudego.pairgoth.pairing.HistoryHelper
+import org.jeudego.pairgoth.pairing.solver.MacMahonSolver
+import org.jeudego.pairgoth.pairing.solver.PairingListener
 import org.jeudego.pairgoth.store.nextGameId
 import org.jeudego.pairgoth.store.nextPlayerId
 import org.jeudego.pairgoth.store.nextTournamentId
@@ -15,8 +17,10 @@ import org.jeudego.pairgoth.util.MutableBiMultiMap
 import org.jeudego.pairgoth.util.mutableBiMultiMapOf
 import kotlin.math.max
 import java.util.*
-import java.util.regex.Pattern
 import kotlin.collections.get
+import kotlin.math.floor
+import kotlin.math.min
+import kotlin.math.round
 import kotlin.math.roundToInt
 
 sealed class Tournament <P: Pairable>(
@@ -61,7 +65,7 @@ sealed class Tournament <P: Pairable>(
     var frozen: Json.Array? = null
 
     // pairing
-    open fun pair(round: Int, pairables: List<Pairable>): List<Game> {
+    open fun pair(round: Int, pairables: List<Pairable>, legacyMode: Boolean = false, listener: PairingListener? = null): List<Game> {
         // Minimal check on round number.
         // CB TODO - the complete check should verify, for each player, that he was either non pairable or implied in the previous round
         if (round > games.size + 1) badRequest("previous round not paired")
@@ -69,7 +73,7 @@ sealed class Tournament <P: Pairable>(
         val evenPairables =
             if (pairables.size % 2 == 0) pairables
             else pairables.toMutableList().also { it.add(ByePlayer) }
-        return pairing.pair(this, round, evenPairables).also { newGames ->
+        return pairing.pair(this, round, evenPairables, legacyMode, listener).also { newGames ->
             if (games.size < round) games.add(mutableMapOf())
             games[round - 1].putAll( newGames.associateBy { it.id } )
         }
@@ -96,14 +100,17 @@ sealed class Tournament <P: Pairable>(
 
     fun lastRound() = max(1, games.size)
 
+    /**
+     * Recompute DUDD for a specific game
+     */
     fun recomputeDUDD(round: Int, gameID: ID) {
         // Instantiate solver with game history
-        val solver = pairing.solver(this, round, pairables.values.toList())
+        val solver = pairing.solver(this, round, emptyList())
 
         // Recomputes DUDD and hd
         val game = games(round)[gameID]!!
-        val white = solver.pairables.find { p-> p.id == game.white }!!
-        val black = solver.pairables.find { p-> p.id == game.black }!!
+        val white = pairables[game.white]!!
+        val black = pairables[game.black]!!
         game.drawnUpDown = solver.dudd(black, white)
         game.handicap = solver.hd(white = white, black = black)
     }
@@ -115,17 +122,16 @@ sealed class Tournament <P: Pairable>(
     fun recomputeDUDD(round: Int) {
         if (pairables.isEmpty() || games(1).isEmpty()) return;
         // Instantiate solver with game history
-        val solver = pairing.solver(this, round, pairables.values.toList())
+        val solver = pairing.solver(this, round, emptyList())
         for (game in games(round).values) {
             if (game.black != 0 && game.white != 0) {
-                val white = solver.pairables.find { p-> p.id == game.white }!!
-                val black = solver.pairables.find { p-> p.id == game.black }!!
+                val white = pairables[game.white]!!
+                val black = pairables[game.black]!!
                 game.drawnUpDown = solver.dudd(black, white)
             }
         }
     }
 
-
     /**
      * Recompute DUDD for all rounds
       */
@@ -208,6 +214,22 @@ sealed class Tournament <P: Pairable>(
         }
         return excluded
     }
+
+    fun roundScore(score: Double): Double {
+        val epsilon = 0.00001
+        // Note: this works for now because we only have .0 and .5 fractional parts
+        return if (pairing.pairingParams.main.roundDownScore) floor(score + epsilon)
+        else round(2 * score) / 2
+    }
+
+    fun Pairable.mmBase(): Double {
+        if (pairing !is MacMahon) throw Error("invalid call: tournament is not Mac Mahon")
+        return min(max(rank, pairing.mmFloor), pairing.mmBar) + MacMahonSolver.mmsZero + mmsCorrection
+    }
+
+    fun historyHelper(round: Int): HistoryHelper {
+        return pairing.solver(this, round, emptyList()).history
+    }
 }
 
 // standard tournament of individuals
@@ -263,7 +285,7 @@ class TeamTournament(
     override fun individualGames(round: Int): Map<ID, Game> {
         val teamGames = games(round)
         return if (type.individual) {
-            return teamGames.values.flatMap { game ->
+            teamGames.values.flatMap { game ->
                 if (game.white == 0 || game.black == 0 ) listOf()
                 else individualGames[game.id]?.toList() ?: listOf()
             }.associateBy { it.id }
@@ -272,8 +294,8 @@ class TeamTournament(
         }
     }
 
-    override fun pair(round: Int, pairables: List<Pairable>) =
-        super.pair(round, pairables).also { games ->
+    override fun pair(round: Int, pairables: List<Pairable>, legacyMode: Boolean, listener: PairingListener?) =
+        super.pair(round, pairables, legacyMode, listener).also { games ->
             if (type.individual) {
                 games.forEach { game ->
                     pairIndividualGames(round, game)

api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/BasePairingHelper.kt

@@ -5,26 +5,17 @@ import org.jeudego.pairgoth.model.*
 abstract class BasePairingHelper(
     val round: Int,
     val totalRounds: Int,
-    history: List<List<Game>>, // History of all games played for each round
+    val history: HistoryHelper, // Digested history of all games played for each round
     var pairables: List<Pairable>, // All pairables for this round, it may include the bye player
-    val pairablesMap: Map<ID, Pairable>, // Map of all known pairables for this tournament
     val pairing: PairingParams,
     val placement: PlacementParams,
     ) {
 
-    abstract val scores: Map<ID, Pair<Double, Double>>
-    abstract val scoresX: Map<ID, Double>
-    val historyHelper =
-        if (pairables.first().let { it is TeamTournament.Team && it.teamOfIndividuals }) TeamOfIndividualsHistoryHelper(
-            history
-        ) { scores }
-        else HistoryHelper(history) { scores }
-
     // Extend pairables with members from all rounds
 
     // The main criterion that will be used to define the groups should be defined by subclasses
     // SOS and variants will be computed based on this score
-    val Pairable.main: Double get() = scores[id]?.second ?: 0.0
+    val Pairable.main: Double get() = score ?: 0.0
     abstract val mainLimits: Pair<Double, Double>
 
     // pairables sorted using overloadable sort function
@@ -84,28 +75,28 @@ abstract class BasePairingHelper(
     }
 
     // already paired players map
-    protected fun Pairable.played(other: Pairable) = historyHelper.playedTogether(this, other)
+    protected fun Pairable.played(other: Pairable) = history.playedTogether(this, other)
 
     // color balance (nw - nb)
-    protected val Pairable.colorBalance: Int get() = historyHelper.colorBalance(this) ?: 0
+    protected val Pairable.colorBalance: Int get() = history.colorBalance[id] ?: 0
 
     protected val Pairable.group: Int get() = _groups[id]!!
 
-    protected val Pairable.drawnUpDown: Pair<Int, Int> get() = historyHelper.drawnUpDown(this) ?: Pair(0, 0)
+    protected val Pairable.drawnUpDown: Pair<Int, Int> get() = history.drawnUpDown[id] ?: Pair(0, 0)
 
-    protected val Pairable.nbBye: Int get() = historyHelper.nbPlayedWithBye(this) ?: 0
+    protected val Pairable.nbBye: Int get() = history.nbPlayedWithBye(this) ?: 0
 
-    // score (number of wins)
-    val Pairable.nbW: Double get() = historyHelper.nbW(this) ?: 0.0
-
-    val Pairable.sos: Double get() = historyHelper.sos[id] ?: 0.0
-    val Pairable.sosm1: Double get() = historyHelper.sosm1[id] ?: 0.0
-    val Pairable.sosm2: Double get() = historyHelper.sosm2[id] ?: 0.0
-    val Pairable.sosos: Double get() = historyHelper.sosos[id] ?: 0.0
-    val Pairable.sodos: Double get() = historyHelper.sodos[id] ?: 0.0
-    val Pairable.cums: Double get() = historyHelper.cumScore[id] ?: 0.0
+    val Pairable.score: Double get() = history.scores[id] ?: 0.0
+    val Pairable.scoreX: Double get() = history.scoresX[id] ?: 0.0
+    val Pairable.nbW: Double get() = history.wins[id] ?: 0.0
+    val Pairable.sos: Double get() = history.sos[id] ?: 0.0
+    val Pairable.sosm1: Double get() = history.sosm1[id] ?: 0.0
+    val Pairable.sosm2: Double get() = history.sosm2[id] ?: 0.0
+    val Pairable.sosos: Double get() = history.sosos[id] ?: 0.0
+    val Pairable.sodos: Double get() = history.sodos[id] ?: 0.0
+    val Pairable.cums: Double get() = history.cumScore[id] ?: 0.0
     fun Pairable.missedRounds(): Int = (1 until round).map { round ->
-        if (historyHelper.playersPerRound.getOrNull(round - 1)
+        if (history.playersPerRound.getOrNull(round - 1)
                 ?.contains(id) == true
         ) 0 else 1
     }.sum()

api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/HistoryHelper.kt

@@ -2,12 +2,22 @@ package org.jeudego.pairgoth.pairing
 
 import org.jeudego.pairgoth.model.*
 import org.jeudego.pairgoth.model.Game.Result.*
-import org.jeudego.pairgoth.model.TeamTournament.Team
+import org.jeudego.pairgoth.pairing.solver.Solver
+
+typealias ScoreMap = Map<ID, Double>
+typealias ScoreMapFactory = () -> ScoreMap
 
 open class HistoryHelper(
-    protected val history: List<List<Game>>,
-    // scoresGetter() returns Pair(sos value for missed rounds, score) where score is nbw for Swiss, mms for MM, ...
-    scoresGetter: HistoryHelper.()-> Map<ID, Pair<Double, Double>>) {
+    protected val history: List<List<Game>>
+) {
+
+    lateinit var scoresFactory: ScoreMapFactory
+    lateinit var scoresXFactory: ScoreMapFactory
+    lateinit var missedRoundsSosFactory: ScoreMapFactory
+
+    val scores by lazy { scoresFactory() }
+    val scoresX by lazy { scoresXFactory() }
+    val missedRoundsSos by lazy { missedRoundsSosFactory() }
 
     private val Game.blackScore get() = when (result) {
         BLACK, BOTHWIN -> 1.0
@@ -19,23 +29,10 @@ open class HistoryHelper(
         else -> 0.0
     }
 
-    private val scores by lazy {
-        scoresGetter()
-    }
-
-    val scoresX by lazy {
-        scoresGetter().mapValues { entry ->
-            entry.value.first + (wins[entry.key] ?: 0.0)
-        }
-    }
-
     // Generic helper functions
     open fun playedTogether(p1: Pairable, p2: Pairable) = paired.contains(Pair(p1.id, p2.id))
     open fun colorBalance(p: Pairable) = colorBalance[p.id]
     open fun nbPlayedWithBye(p: Pairable) = nbPlayedWithBye[p.id]
-    open fun nbW(p: Pairable) = wins[p.id]
-
-    fun drawnUpDown(p: Pairable) = drawnUpDown[p.id]
 
     protected val paired: Set<Pair<ID, ID>> by lazy {
         (history.flatten().map { game ->
@@ -47,7 +44,7 @@ open class HistoryHelper(
 
     // Returns the number of games played as white minus the number of games played as black
     // Only count games without handicap
-    private val colorBalance: Map<ID, Int> by lazy {
+    val colorBalance: Map<ID, Int> by lazy {
         history.flatten().filter { game ->
             game.handicap == 0
         }.filter { game ->
@@ -72,14 +69,14 @@ open class HistoryHelper(
         }
     }
 
-    // Set of all implied players for each round (warning: does comprise games with BIP)
+    // Set of all implied players for each round
     val playersPerRound: List<Set<ID>> by lazy {
-        history.map {
-            it.fold(mutableSetOf<ID>()) { acc, next ->
-                if(next.white != 0) acc.add(next.white)
-                if (next.black != 0) acc.add(next.black)
-                acc
-            }
+        history.map { roundGames ->
+            roundGames.flatMap {
+                game -> listOf(game.white, game.black)
+            }.filter { id ->
+                id != ByePlayer.id
+            }.toSet()
         }
     }
 
@@ -100,67 +97,89 @@ open class HistoryHelper(
     }
 
     // define mms to be a synonym of scores
-    val mms by lazy { scores.mapValues { it -> it.value.second } }
+    val mms by lazy { scores }
 
     val sos by lazy {
+        // SOS for played games against a real opponent or BIP
         val historySos = (history.flatten().map { game ->
             Pair(
                 game.black,
-                if (game.white == 0) scores[game.black]?.first ?: 0.0
-                else scores[game.white]?.second?.let { it - game.handicap } ?: 0.0
+                if (game.white == 0) missedRoundsSos[game.black] ?: 0.0
+                else scores[game.white]?.let { it - game.handicap } ?: 0.0
             )
         } + history.flatten().map { game ->
             Pair(
                 game.white,
-                if (game.black == 0) scores[game.white]?.first ?: 0.0
-                else scores[game.black]?.second?.let { it + game.handicap } ?: 0.0
+                if (game.black == 0) missedRoundsSos[game.white] ?: 0.0
+                else scores[game.black]?.let { it + game.handicap } ?: 0.0
             )
         }).groupingBy {
             it.first
         }.fold(0.0) { acc, next ->
             acc + next.second
         }
-
-        scores.mapValues { (id, pair) ->
+        // plus SOS for missed rounds
+        missedRoundsSos.mapValues { (id, pseudoSos) ->
             (historySos[id] ?: 0.0) + playersPerRound.sumOf {
-                if (it.contains(id)) 0.0 else pair.first
+                if (it.contains(id)) 0.0 else pseudoSos
             }
-
         }
     }
 
     // sos-1
     val sosm1 by lazy {
+        // SOS for played games against a real opponent or BIP
         (history.flatten().map { game ->
-            Pair(game.black, scores[game.white]?.second?.let { it - game.handicap } ?: 0.0)
+            Pair(
+                game.black,
+                if (game.white == 0) missedRoundsSos[game.black] ?: 0.0
+                else scores[game.white]?.let { it - game.handicap } ?: 0.0
+            )
         } + history.flatten().map { game ->
-            Pair(game.white, scores[game.black]?.second?.let { it + game.handicap } ?: 0.0)
+            Pair(
+                game.white,
+                if (game.black == 0) missedRoundsSos[game.white] ?: 0.0
+                else scores[game.black]?.let { it + game.handicap } ?: 0.0
+            )
         }).groupBy {
             it.first
         }.mapValues { (id, pairs) ->
           val oppScores = pairs.map { it.second }.sortedDescending()
+            // minus greatest SOS
           oppScores.sum() - (oppScores.firstOrNull() ?: 0.0) +
+              // plus SOS for missed rounds
               playersPerRound.sumOf { players ->
                   if (players.contains(id)) 0.0
-                  else scores[id]?.first ?: 0.0
+                  else missedRoundsSos[id] ?: 0.0
               }
         }
     }
 
     // sos-2
     val sosm2 by lazy {
+        // SOS for played games against a real opponent or BIP
         (history.flatten().map { game ->
-            Pair(game.black, scores[game.white]?.second?.let { it - game.handicap } ?: 0.0)
+            Pair(
+                game.black,
+                if (game.white == 0) missedRoundsSos[game.black] ?: 0.0
+                else scores[game.white]?.let { it - game.handicap } ?: 0.0
+            )
         } + history.flatten().map { game ->
-            Pair(game.white, scores[game.black]?.second?.let { it + game.handicap } ?: 0.0)
+            Pair(
+                game.white,
+                if (game.black == 0) missedRoundsSos[game.white] ?: 0.0
+                else scores[game.black]?.let { it + game.handicap } ?: 0.0
+            )
         }).groupBy {
             it.first
         }.mapValues { (id, pairs) ->
-            val oppScores = pairs.map { it.second }.sorted()
+            val oppScores = pairs.map { it.second }.sortedDescending()
+            // minus two greatest SOS
             oppScores.sum() - oppScores.getOrElse(0) { 0.0 } - oppScores.getOrElse(1) { 0.0 } +
+                // plus SOS for missed rounds
                 playersPerRound.sumOf { players ->
                     if (players.contains(id)) 0.0
-                    else scores[id]?.first ?: 0.0
+                    else missedRoundsSos[id] ?: 0.0
                 }
         }
     }
@@ -170,16 +189,17 @@ open class HistoryHelper(
         (history.flatten().filter { game ->
             game.white != 0 // Remove games against byePlayer
         }.map { game ->
-            Pair(game.black, if (game.result == Game.Result.BLACK) scores[game.white]?.second?.let { it - game.handicap } ?: 0.0 else 0.0)
+            Pair(game.black, if (game.result == Game.Result.BLACK) scores[game.white]?.let { it - game.handicap } ?: 0.0 else 0.0)
         } + history.flatten().filter { game ->
             game.white != 0 // Remove games against byePlayer
         }.map { game ->
-            Pair(game.white, if (game.result == Game.Result.WHITE) scores[game.black]?.second?.let { it + game.handicap } ?: 0.0 else 0.0)
+            Pair(game.white, if (game.result == Game.Result.WHITE) scores[game.black]?.let { it + game.handicap } ?: 0.0 else 0.0)
         }).groupingBy { it.first }.fold(0.0) { acc, next ->
             acc + next.second
         }
     }
 
+
     // sosos
     val sosos by lazy {
         val currentRound = history.size
@@ -193,9 +213,9 @@ open class HistoryHelper(
             acc + next.second
         }
 
-        scores.mapValues { (id, pair) ->
+        missedRoundsSos.mapValues { (id, missedRoundSos) ->
             (historySosos[id] ?: 0.0) + playersPerRound.sumOf {
-                if (it.contains(id)) 0.0 else pair.first * currentRound
+                if (it.contains(id)) 0.0 else missedRoundSos * currentRound
             }
 
         }
@@ -241,11 +261,4 @@ open class HistoryHelper(
             else null
         }
     }
-
-}
-
-// CB TODO - a big problem with the current naive implementation is that the team score is -for now- the sum of team members individual scores
-
-class TeamOfIndividualsHistoryHelper(history: List<List<Game>>, scoresGetter: () -> Map<ID, Pair<Double, Double>>):
-        HistoryHelper(history, { scoresGetter() }) {
 }

api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/Random.kt

@@ -1,7 +1,6 @@
 package org.jeudego.pairgoth.pairing
 
 import org.jeudego.pairgoth.model.Pairable
-import org.jeudego.pairgoth.pairing.solver.BaseSolver
 
 fun detRandom(max: Double, p1: Pairable, p2: Pairable, symmetric: Boolean): Double {
     var inverse = false

api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/MacMahonSolver.kt

@@ -1,6 +1,7 @@
 package org.jeudego.pairgoth.pairing.solver
 
 import org.jeudego.pairgoth.model.*
+import org.jeudego.pairgoth.pairing.HistoryHelper
 import java.util.*
 import kotlin.math.max
 import kotlin.math.min
@@ -8,46 +9,41 @@ import kotlin.math.roundToInt
 
 class MacMahonSolver(round: Int,
                      totalRounds: Int,
-                     history: List<List<Game>>,
+                     history: HistoryHelper,
                      pairables: List<Pairable>,
-                     pairablesMap: Map<ID, Pairable>,
+                     allPairablesMap: Map<ID, Pairable>,
                      pairingParams: PairingParams,
                      placementParams: PlacementParams,
                      usedTables: BitSet,
                      private val mmFloor: Int, private val mmBar: Int)  :
-    BaseSolver(round, totalRounds, history, pairables, pairablesMap, pairingParams, placementParams, usedTables) {
+    Solver(round, totalRounds, history, pairables, allPairablesMap, pairingParams, placementParams, usedTables) {
 
-    override val scores: Map<ID, Pair<Double, Double>> by lazy {
-        require (mmBar > mmFloor) { "MMFloor is higher than MMBar" }
-        pairablesMap.mapValues {
-            it.value.let { pairable ->
-                val score = roundScore(pairable.mmBase +
+    override fun mainScoreMapFactory() =
+        allPairablesMap.mapValues { (id, pairable) ->
+            roundScore(pairable.mmBase +
                     pairable.nbW +
-                        pairable.missedRounds() * pairingParams.main.mmsValueAbsent)
-                Pair(
-                    if (pairingParams.main.sosValueAbsentUseBase) pairable.mmBase
-                    else roundScore(pairable.mmBase + round/2),
-                    score
-                )
-            }
-        }
+                    pairable.missedRounds() * pairing.main.mmsValueAbsent)
         }
 
-    override val scoresX: Map<ID, Double> by lazy {
-        require (mmBar > mmFloor) { "MMFloor is higher than MMBar" }
-        pairablesMap.mapValues {
-            it.value.let { pairable ->
+    override fun scoreXMapFactory() =
+        allPairablesMap.mapValues { (id, pairable) ->
             roundScore(pairable.mmBase + pairable.nbW)
         }
+
+    override fun missedRoundSosMapFactory() =
+        allPairablesMap.mapValues { (id, pairable) ->
+            if (pairing.main.sosValueAbsentUseBase) {
+                pairable.mmBase
+            } else {
+                roundScore(pairable.mmBase + round/2)
             }
         }
 
     override fun computeWeightForBye(p: Pairable): Double{
-        return 2*scores[p.id]!!.second
+        return 2 * p.score
     }
 
-    override fun SecondaryCritParams.apply(p1: Pairable, p2: Pairable): Double {
-
+    override fun SecondaryCritParams.playersMeetCriteria(p1: Pairable, p2: Pairable): Int {
         // playersMeetCriteria = 0 : No player is above thresholds -> apply the full weight
         // playersMeetCriteria = 1 : 1 player is above thresholds -> apply half the weight
         // playersMeetCriteria = 2 : Both players are above thresholds -> do not apply weight
@@ -70,7 +66,7 @@ class MacMahonSolver(round: Int,
             || barThresholdActive && (p2.mmBase >= mmBar - Pairable.MIN_RANK)
             || p2.mms >= rankSecThreshold - Pairable.MIN_RANK) playersMeetCriteria++
 
-        return pairing.geo.apply(p1, p2, playersMeetCriteria)
+        return playersMeetCriteria
     }
 
     override fun HandicapParams.pseudoRank(pairable: Pairable): Int {
@@ -84,8 +80,7 @@ class MacMahonSolver(round: Int,
     // mmBase: starting Mac-Mahon score of the pairable
     val Pairable.mmBase: Double get() = min(max(rank, mmFloor), mmBar) + mmsZero + mmsCorrection
     // mms: current Mac-Mahon score of the pairable
-    val Pairable.mms: Double get() = scores[id]?.second ?: 0.0
-    val Pairable.scoreX: Double get() = scoresX[id] ?: 0.0
+    val Pairable.mms: Double get() = score
 
     // CB TODO - configurable criteria
     val mainScoreMin = mmFloor + PLA_SMMS_SCORE_MIN - Pairable.MIN_RANK

api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/PairingListener.kt

@@ -0,0 +1,75 @@
+package org.jeudego.pairgoth.pairing.solver
+
+import org.jeudego.pairgoth.model.ID
+import org.jeudego.pairgoth.model.Pairable
+import org.jeudego.pairgoth.model.Tournament
+import java.io.PrintWriter
+
+interface PairingListener {
+
+    fun start(round: Int) {}
+    fun startPair(white: Pairable, black: Pairable) {}
+    fun endPair(white: Pairable, black: Pairable) {}
+    fun addWeight(name: String, weight: Double)
+    fun end() {}
+}
+
+class LoggingListener(val out: PrintWriter) : PairingListener {
+
+    var currentOpenGothaWeight: Double = 0.0
+
+    override fun start(round: Int) {
+        out.println("Round $round")
+        out.println("Costs")
+    }
+
+    override fun startPair(white: Pairable, black: Pairable) {
+        currentOpenGothaWeight = 0.0
+        out.println("Player1Name=${white.fullName()}")
+        out.println("Player2Name=${black.fullName()}")
+    }
+
+    override fun addWeight(name: String, weight: Double) {
+        // Try hard to stay in sync with current reference files of OpenGotha conformance tests
+        val key = when (name) {
+            // TODO - Change to propagate to test reference files
+            "baseColorBalance" -> "baseBWBalance"
+            // Pairgoth-specific part of the color balance, not considered in conformance tests
+            "secColorBalance" -> return
+            else -> name
+        }
+        val value = when (name) {
+            // TODO - This cost is always zero in reference files, seems unused
+            "secHandi" -> 0.0
+            else -> weight
+        }
+        currentOpenGothaWeight += value
+        out.println("${key}Cost=$value")
+    }
+
+    override fun endPair(white: Pairable, black: Pairable) {
+        out.println("totalCost=$currentOpenGothaWeight")
+    }
+
+    override fun end() {
+        out.flush()
+    }
+}
+
+class CollectingListener() : PairingListener {
+
+    val out = mutableMapOf<Pair<ID, ID>, MutableMap<String, Double>>()
+    var white: Pairable? = null
+    var black: Pairable? = null
+
+    override fun startPair(white: Pairable, black: Pairable) {
+        this.white = white
+        this.black = black
+    }
+
+    override fun addWeight(name: String, weight: Double) {
+        val key = Pair(white!!.id, black!!.id)
+        val weights = out.computeIfAbsent(key) { mutableMapOf() }
+        weights[name] = weight
+    }
+}

api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/Solver.kt

@@ -4,6 +4,7 @@ import org.jeudego.pairgoth.model.*
 import org.jeudego.pairgoth.model.MainCritParams.DrawUpDown
 import org.jeudego.pairgoth.model.MainCritParams.SeedMethod.*
 import org.jeudego.pairgoth.pairing.BasePairingHelper
+import org.jeudego.pairgoth.pairing.HistoryHelper
 import org.jeudego.pairgoth.pairing.detRandom
 import org.jeudego.pairgoth.pairing.nonDetRandom
 import org.jeudego.pairgoth.store.nextGameId
@@ -18,26 +19,48 @@ import java.text.DecimalFormat
 import java.util.*
 import kotlin.math.*
 
-sealed class BaseSolver(
+sealed class Solver(
     round: Int,
     totalRounds: Int,
-    history: List<List<Game>>, // History of all games played for each round
-    pairables: List<Pairable>, // All pairables for this round, it may include the bye player
-    pairablesMap: Map<ID, Pairable>, // Map of all known pairables in this tournament
+    history: HistoryHelper,    // Digested history of all games played for each round
+    pairables: List<Pairable>, // Pairables to pair together
+    val allPairablesMap: Map<ID, Pairable>, // Map of all known pairables
     pairing: PairingParams,
     placement: PlacementParams,
     val usedTables: BitSet
-    ) : BasePairingHelper(round, totalRounds, history, pairables, pairablesMap, pairing, placement) {
+    ) : BasePairingHelper(round, totalRounds, history, pairables, pairing, placement) {
 
     companion object {
         val rand = Random(/* seed from properties - TODO */)
-        // Used in tests
-        var weightsLogger: PrintWriter? = null
-        var legacy_mode = false
     }
 
+    // For tests and explain feature
+    var legacyMode = false
+    var pairingListener: PairingListener? = null
+
+    init {
+        history.scoresFactory = this::mainScoreMapFactory
+        history.scoresXFactory = this::scoreXMapFactory
+        history.missedRoundsSosFactory = this::missedRoundSosMapFactory
+    }
+
+    /**
+     * Main score map factory (NBW for Swiss, MMS for MacMahon, ...).
+     */
+    abstract fun mainScoreMapFactory(): Map<ID, Double>
+
+    /**
+     * ScoreX map factory (NBW for Swiss, MMSBase + MMS for MacMahon, ...).
+     */
+    abstract fun scoreXMapFactory(): Map<ID, Double>
+
+    /**
+     * SOS for missed rounds factory (0 for Swiss, mmBase or mmBase+rounds/2 for MacMahon depending on pairing option sosValueAbsentUseBase)
+     */
+    abstract fun missedRoundSosMapFactory(): Map<ID, Double>
+
     open fun openGothaWeight(p1: Pairable, p2: Pairable) =
-        1.0 + // 1 is minimum value because 0 means "no matching allowed"
+        1.0 + // 1 is the minimum value because 0 means "no matching allowed"
                 pairing.base.apply(p1, p2) +
                 pairing.main.apply(p1, p2) +
                 pairing.secondary.apply(p1, p2)
@@ -49,20 +72,26 @@ sealed class BaseSolver(
         else 0.0
     }
 
-    open fun weight(p1: Pairable, p2: Pairable) =
+    open fun weight(p1: Pairable, p2: Pairable): Double {
+        pairingListener?.startPair(p1, p2)
+        return (
             openGothaWeight(p1, p2) +
-        pairgothBlackWhite(p1, p2) +
+            pairgothBlackWhite(p1, p2).also { pairingListener?.addWeight("secColorBalance", it) } +
             // pairing.base.applyByeWeight(p1, p2) +
-        pairing.handicap.color(p1, p2)
+            pairing.handicap.color(p1, p2).also { pairingListener?.addWeight("secHandi", it) }
+        ).also {
+            pairingListener?.endPair(p1, p2)
+        }
+    }
 
-    open fun computeWeightForBye(p: Pairable): Double{
+    open fun computeWeightForBye(p: Pairable): Double {
         // The weightForBye function depends on the system type (Mac-Mahon or Swiss), default value is 0.0
         return 0.0
     }
 
     fun pair(): List<Game> {
         // check that at this stage, we have an even number of pairables
-        // The BYE player should have been added beforehand to make a number of pairables even.
+        // The BYE player should have been added beforehand to make the number of pairables even.
         if (pairables.size % 2 != 0) throw Error("expecting an even number of pairables")
         val builder = GraphBuilder(SimpleDirectedWeightedGraph<Pairable, DefaultWeightedEdge>(DefaultWeightedEdge::class.java))
 
@@ -70,21 +99,18 @@ sealed class BaseSolver(
         val logger = LoggerFactory.getLogger("debug")
         val debug = false
 
-        weightsLogger?.apply {
-            this.println("Round $round")
-            this.println("Costs")
-        }
+        pairingListener?.start(round)
 
         var chosenByePlayer: Pairable = ByePlayer
         // Choose bye player and remove from pairables
         if (ByePlayer in nameSortedPairables){
             nameSortedPairables.remove(ByePlayer)
-            var minWeight = 1000.0*round + (Pairable.MAX_RANK - Pairable.MIN_RANK) + 1;
+            var minWeight = 1000.0 * round + (Pairable.MAX_RANK - Pairable.MIN_RANK) + 1;
             var weightForBye : Double
             var byePlayerIndex = 0
             for (p in nameSortedPairables){
                 weightForBye = computeWeightForBye(p)
-                if (p.id in historyHelper.byePlayers) weightForBye += 1000
+                if (p.id in history.byePlayers) weightForBye += 1000
                 if (weightForBye <= minWeight){
                     minWeight = weightForBye
                     chosenByePlayer = p
@@ -102,21 +128,6 @@ sealed class BaseSolver(
                 val q = nameSortedPairables[j]
                 weight(p, q).let { if (it != Double.NaN) builder.addEdge(p, q, it/1e6) }
                 weight(q, p).let { if (it != Double.NaN) builder.addEdge(q, p, it/1e6) }
-                weightsLogger?.apply {
-                    this.println("Player1Name=${p.fullName()}")
-                    this.println("Player2Name=${q.fullName()}")
-                    this.println("baseDuplicateGameCost=${dec.format(pairing.base.avoidDuplicatingGames(p, q))}")
-                    this.println("baseRandomCost=${dec.format(pairing.base.applyRandom(p, q))}")
-                    this.println("baseBWBalanceCost=${dec.format(pairing.base.applyColorBalance(p, q))}")
-                    this.println("mainCategoryCost=${dec.format(pairing.main.avoidMixingCategory(p, q))}")
-                    this.println("mainScoreDiffCost=${dec.format(pairing.main.minimizeScoreDifference(p, q))}")
-                    this.println("mainDUDDCost=${dec.format(pairing.main.applyDUDD(p, q))}")
-                    this.println("mainSeedCost=${dec.format(pairing.main.applySeeding(p, q))}")
-                    this.println("secHandiCost=${dec.format(pairing.handicap.handicap(p, q))}")
-                    this.println("secGeoCost=${dec.format(pairing.secondary.apply(p, q))}")
-                    this.println("totalCost=${dec.format(openGothaWeight(p,q))}")
-                    //File(WEIGHTS_FILE).appendText("ByeCost="+dec.format(pairing.base.applyByeWeight(p,q))+"\n")
-                }
             }
         }
         val graph = builder.build()
@@ -131,6 +142,8 @@ sealed class BaseSolver(
         // add game for ByePlayer
         if (chosenByePlayer != ByePlayer) result += Game(id = nextGameId, table = 0, white = chosenByePlayer.id, black = ByePlayer.id, result = Game.Result.fromSymbol('w'))
 
+        pairingListener?.end()
+
         if (debug) {
             var sumOfWeights = 0.0
 
@@ -144,8 +157,8 @@ sealed class BaseSolver(
             for (p in sortedPairables) {
                 logger.info(String.format("%-20s", p.name.substring(0, min(p.name.length, 18)))
                         + " " + String.format("%-4s", p.id)
-                        + " " + String.format("%-4s", scores[p.id]?.first)
-                        + " " + String.format("%-4s", scores[p.id]?.second)
+                        + " " + String.format("%-4s", history.missedRoundsSos[p.id])
+                        + " " + String.format("%-4s", history.scores[p.id])
                         + " " + String.format("%-4s", p.sos)
                 )
             }
@@ -194,11 +207,11 @@ sealed class BaseSolver(
         var score = 0.0
         // Base Criterion 1 : Avoid Duplicating Game
         // Did p1 and p2 already play ?
-        score += avoidDuplicatingGames(p1, p2)
+        score += avoidDuplicatingGames(p1, p2).also { pairingListener?.addWeight("baseDuplicateGame", it) }
         // Base Criterion 2 : Random
-        score += applyRandom(p1, p2)
+        score += applyRandom(p1, p2).also { pairingListener?.addWeight("baseRandom", it) }
         // Base Criterion 3 : Balance W and B
-        score += applyColorBalance(p1, p2)
+        score += applyColorBalance(p1, p2).also { pairingListener?.addWeight("baseColorBalance", it) }
 
         return score
     }
@@ -258,16 +271,16 @@ sealed class BaseSolver(
         var score = 0.0
 
         // Main criterion 1 avoid mixing category is moved to Swiss with category
-        score += avoidMixingCategory(p1, p2)
+        score += avoidMixingCategory(p1, p2).also { pairingListener?.addWeight("mainCategory", it) }
 
         // Main criterion 2 minimize score difference
-        score += minimizeScoreDifference(p1, p2)
+        score += minimizeScoreDifference(p1, p2).also { pairingListener?.addWeight("mainScoreDiff", it) }
 
         // Main criterion 3 If different groups, make a directed Draw-up/Draw-down
-        score += applyDUDD(p1, p2)
+        score += applyDUDD(p1, p2).also { pairingListener?.addWeight("mainDUDD", it) }
 
         // Main criterion 4 seeding
-        score += applySeeding(p1, p2)
+        score += applySeeding(p1, p2).also { pairingListener?.addWeight("mainSeed", it) }
 
         return score
     }
@@ -389,7 +402,7 @@ sealed class BaseSolver(
                         val randRange = maxSeedingWeight * 0.2
                         // for old tests to pass
                         val rand =
-                            if (legacy_mode && p1.fullName() > p2.fullName()) {
+                            if (legacyMode && p1.fullName() > p2.fullName()) {
                                 // for old tests to pass
                                 detRandom(randRange, p2, p1, false)
                             } else {
@@ -405,8 +418,7 @@ sealed class BaseSolver(
         return Math.round(score).toDouble()
     }
 
-    open fun SecondaryCritParams.apply(p1: Pairable, p2: Pairable): Double {
-
+    open fun SecondaryCritParams.playersMeetCriteria(p1: Pairable, p2: Pairable): Int {
         // playersMeetCriteria = 0 : No player is above thresholds -> apply secondary criteria
         // playersMeetCriteria = 1 : 1 player is above thresholds -> apply half the weight
         // playersMeetCriteria = 2 : Both players are above thresholds -> apply the full weight
@@ -419,7 +431,11 @@ sealed class BaseSolver(
         if (2*p1.nbW >= nbw2Threshold) playersMeetCriteria++
         if (2*p2.nbW >= nbw2Threshold) playersMeetCriteria++
 
-        return pairing.geo.apply(p1, p2, playersMeetCriteria)
+        return playersMeetCriteria
+    }
+
+    fun SecondaryCritParams.apply(p1: Pairable, p2: Pairable): Double {
+        return pairing.geo.apply(p1, p2, playersMeetCriteria(p1, p2))
     }
 
     fun GeographicalParams.apply(p1: Pairable, p2: Pairable, playersMeetCriteria: Int): Double {
@@ -427,11 +443,11 @@ sealed class BaseSolver(
 
         val geoMaxCost = pairing.geo.avoidSameGeo
 
-		val countryFactor: Int = if (legacy_mode || biggestCountrySize.toDouble() / pairables.size <= proportionMainClubThreshold)
+		val countryFactor: Int = if (legacyMode || biggestCountrySize.toDouble() / pairables.size <= proportionMainClubThreshold)
 			preferMMSDiffRatherThanSameCountry
 		else
 			0
-		val clubFactor: Int = if (legacy_mode || biggestClubSize.toDouble() / pairables.size <= proportionMainClubThreshold)
+		val clubFactor: Int = if (legacyMode || biggestClubSize.toDouble() / pairables.size <= proportionMainClubThreshold)
 			preferMMSDiffRatherThanSameClub
 		else
 			0
@@ -489,7 +505,7 @@ sealed class BaseSolver(
             2 -> geoMaxCost
             1 -> 0.5 * (geoNominalCost + geoMaxCost)
             else -> geoNominalCost
-        }
+        }.also { pairingListener?.addWeight("secGeo", it) }
     }
 
     // Handicap functions
@@ -537,7 +553,7 @@ sealed class BaseSolver(
             } else if (p1.colorBalance < p2.colorBalance) {
                 score = 1.0
             } else { // choose color from a det random
-                if (detRandom(1.0, p1, p2, false) === 0.0) {
+                if (detRandom(1.0, p1, p2, false) == 0.0) {
                     score = 1.0
                 } else {
                     score = -1.0

api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/SwissSolver.kt

@@ -1,31 +1,35 @@
 package org.jeudego.pairgoth.pairing.solver
 
 import org.jeudego.pairgoth.model.*
+import org.jeudego.pairgoth.pairing.HistoryHelper
 import java.util.*
 
 class SwissSolver(round: Int,
                   totalRounds: Int,
-                  history: List<List<Game>>,
+                  history: HistoryHelper,
                   pairables: List<Pairable>,
-                  pairablesMap: Map<ID, Pairable>,
+                  allPairablesMap: Map<ID, Pairable>,
                   pairingParams: PairingParams,
                   placementParams: PlacementParams,
                   usedTables: BitSet
 ):
-    BaseSolver(round, totalRounds, history, pairables, pairablesMap, pairingParams, placementParams, usedTables) {
+    Solver(round, totalRounds, history, pairables, allPairablesMap, pairingParams, placementParams, usedTables) {
 
-    // In a Swiss tournament the main criterion is the number of wins and already computed
+    override fun mainScoreMapFactory() =
+        allPairablesMap.mapValues { (id, pairable) ->
+            history.wins[id] ?: 0.0
+        }
 
-    override val scores by lazy {
-        pairablesMap.mapValues {
-            Pair(0.0, historyHelper.wins[it.value.id] ?: 0.0)
+    override fun scoreXMapFactory() = mainScoreMapFactory()
+
+    override fun missedRoundSosMapFactory() =
+        allPairablesMap.mapValues { (id, pairable) ->
+            0.0
         }
-    }
-    override val scoresX: Map<ID, Double> get() = scores.mapValues { it.value.second }
 
     override val mainLimits = Pair(0.0, round - 1.0)
 
     override fun computeWeightForBye(p: Pairable): Double{
-        return p.rank + 40*p.main
+        return p.rank + 40 * p.main
     }
 }

api-webapp/src/main/kotlin/org/jeudego/pairgoth/server/ApiServlet.kt

@@ -5,6 +5,7 @@ import com.github.benmanes.caffeine.cache.Caffeine
 import com.republicate.kson.Json
 import org.apache.commons.io.input.BOMInputStream
 import org.jeudego.pairgoth.api.ApiHandler
+import org.jeudego.pairgoth.api.ExplainHandler
 import org.jeudego.pairgoth.api.PairingHandler
 import org.jeudego.pairgoth.api.PlayerHandler
 import org.jeudego.pairgoth.api.ResultsHandler
@@ -99,6 +100,7 @@ class ApiServlet: HttpServlet() {
                     if ("token" == selector) TokenHandler
                     else when (subEntity) {
                         null -> TournamentHandler
+                        "explain" -> ExplainHandler
                         "part" -> PlayerHandler
                         "pair" -> PairingHandler
                         "res" -> ResultsHandler

api-webapp/src/test/kotlin/BOSP2024Test.kt

@@ -1,14 +1,12 @@
 package org.jeudego.pairgoth.test
 
 import com.republicate.kson.Json
-import org.jeudego.pairgoth.pairing.solver.BaseSolver
-import org.jeudego.pairgoth.model.Game
+import org.jeudego.pairgoth.pairing.solver.Solver
 import org.jeudego.pairgoth.test.PairingTests.Companion.compare_weights
 import org.junit.jupiter.api.Test
 import java.io.FileWriter
 import java.io.PrintWriter
 import java.nio.charset.StandardCharsets
-import kotlin.test.assertEquals
 import kotlin.test.assertNotEquals
 import kotlin.test.assertNotNull
 import kotlin.test.assertTrue
@@ -22,24 +20,22 @@ class BOSP2024Test: TestBase() {
         )!!.asObject()
         val resp = TestAPI.post("/api/tour", tournament).asObject()
         val tourId = resp.getInt("id")
-        BaseSolver.weightsLogger = PrintWriter(FileWriter(getOutputFile("bosp2024-weights.txt")))
-
-        BaseSolver.legacy_mode = true
-        TestAPI.post("/api/tour/$tourId/pair/3", Json.Array("all")).asArray()
+        val outputFile = getOutputFile("bosp2024-weights.txt")
+        TestAPI.post("/api/tour/$tourId/pair/3?legacy=true&weights_output=$outputFile", Json.Array("all")).asArray()
 
         // compare weights
-        assertTrue(compare_weights(getOutputFile("bosp2024-weights.txt"), getTestFile("opengotha/bosp2024/bosp2024_weights_R3.txt")), "Not matching opengotha weights for BOSP test")
+        assertTrue(compare_weights(outputFile, getTestFile("opengotha/bosp2024/bosp2024_weights_R3.txt")), "Not matching opengotha weights for BOSP test")
         TestAPI.delete("/api/tour/$tourId/pair/3", Json.Array("all"))
 
-        BaseSolver.legacy_mode = false
         val games = TestAPI.post("/api/tour/$tourId/pair/3", Json.Array("all")).asArray()
         // Aksut Husrev is ID 18
-        val solved = games.map { it as Json.Object }.filter { game ->
+        val solved = games.map { it as Json.Object }.firstOrNull { game ->
             // build the two-elements set of players ids
-            val players = game.entries.filter { (k, v) -> k == "b" || k == "w" }.map { (k, v) -> (v as Number).toInt() }.toSet()
+            val players =
+                game.entries.filter { (k, v) -> k == "b" || k == "w" }.map { (k, v) -> (v as Number).toInt() }.toSet()
             // keep game with Aksut Husrev
             players.contains(18)
-        }.firstOrNull()
+        }
 
         assertNotNull(solved)
 

api-webapp/src/test/kotlin/MalavasiTest.kt

@@ -1,11 +1,8 @@
 package org.jeudego.pairgoth.test
 
 import com.republicate.kson.Json
-import org.jeudego.pairgoth.pairing.solver.BaseSolver
 import org.jeudego.pairgoth.test.PairingTests.Companion.compare_weights
 import org.junit.jupiter.api.Test
-import java.io.FileWriter
-import java.io.PrintWriter
 import java.nio.charset.StandardCharsets
 import kotlin.test.assertEquals
 import kotlin.test.assertTrue
@@ -19,8 +16,8 @@ class MalavasiTest: TestBase() {
         )!!.asObject()
         val resp = TestAPI.post("/api/tour", tournament).asObject()
         val tourId = resp.getInt("id")
-        BaseSolver.weightsLogger = PrintWriter(FileWriter(getOutputFile("malavasi-weights.txt")))
-        val games = TestAPI.post("/api/tour/$tourId/pair/2", Json.Array("all")).asArray()
+        val outputFile = getOutputFile("malavasi-weights.txt")
+        val games = TestAPI.post("/api/tour/$tourId/pair/2?weights_output=$outputFile", Json.Array("all")).asArray()
         // Oceane is ID 548, Valentine 549
         val buggy = games.map { it as Json.Object }.filter { game ->
             // build the two-elements set of players ids
@@ -33,6 +30,6 @@ class MalavasiTest: TestBase() {
         assertEquals(2, buggy.size)
 
         // compare weights
-        assertTrue(compare_weights(getOutputFile("malavasi-weights.txt"), getTestFile("opengotha/malavasi/malavasi_weights_R2.txt")), "Not matching opengotha weights for Malavasi test")
+        assertTrue(compare_weights(outputFile, getTestFile("opengotha/malavasi/malavasi_weights_R2.txt")), "Not matching opengotha weights for Malavasi test")
     }
 }

api-webapp/src/test/kotlin/PairingTests.kt

@@ -2,14 +2,12 @@ package org.jeudego.pairgoth.test
 
 import com.republicate.kson.Json
 import org.jeudego.pairgoth.model.*
-import org.jeudego.pairgoth.pairing.solver.BaseSolver
+import org.jeudego.pairgoth.pairing.solver.Solver
 import org.jeudego.pairgoth.store.MemoryStore
 import org.jeudego.pairgoth.store.lastPlayerId
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 import java.io.File
-import java.io.FileWriter
-import java.io.PrintWriter
 import java.nio.charset.StandardCharsets
 import java.text.DecimalFormat
 import kotlin.math.abs
@@ -59,7 +57,6 @@ class PairingTests: TestBase() {
         }
 
         fun compare_weights(file1: File, file2: File, skipSeeding: Boolean = false):Boolean {
-            BaseSolver.weightsLogger!!.flush()
             // Maps to store name pairs and costs
             val map1 = create_weights_map(file1)
             val map2 = create_weights_map(file2)
@@ -165,6 +162,7 @@ class PairingTests: TestBase() {
     }
 
     fun test_from_XML(name: String, forcePairing:List<Int>) {
+        // Let pairgoth use the legacy asymmetric detRandom()
         test_from_XML_internal(name, forcePairing, true)
         // Non-legacy tests inhibited for now: pairings differ for Toulouse and SimpleMM
         // test_from_XML_internal(name, forcePairing, false)
@@ -172,11 +170,10 @@ class PairingTests: TestBase() {
 
     fun test_from_XML_internal(name: String, forcePairing:List<Int>, legacy: Boolean) {
         // Let pairgoth use the legacy asymmetric detRandom()
-        BaseSolver.legacy_mode = legacy
         // read tournament with pairing
-        val file = getTestFile("opengotha/pairings/$name.xml")
-        logger.info("read from file $file")
-        val resource = file.readText(StandardCharsets.UTF_8)
+        val tourFile = getTestFile("opengotha/pairings/$name.xml")
+        logger.info("read from file $tourFile")
+        val resource = tourFile.readText(StandardCharsets.UTF_8)
         var resp = TestAPI.post("/api/tour", resource)
         val id = resp.asObject().getInt("id")
         val tournament = TestAPI.get("/api/tour/$id").asObject()
@@ -203,15 +200,15 @@ class PairingTests: TestBase() {
         for (round in 1..tournament.getInt("rounds")!!) {
             val sumOfWeightsOG = compute_sumOfWeight_OG(getTestFile("opengotha/$name/$name" + "_weights_R$round.txt"), pairingsOG[round-1], players)
 
-            BaseSolver.weightsLogger = PrintWriter(FileWriter(getOutputFile("weights.txt")))
+            val outputFile = getOutputFile("weights.txt")
             // Call Pairgoth pairing solver to generate games
-            games = TestAPI.post("/api/tour/$id/pair/$round", Json.Array("all")).asArray()
+            games = TestAPI.post("/api/tour/$id/pair/$round?legacy=$legacy&weights_output=$outputFile", Json.Array("all")).asArray()
             logger.info("sumOfWeightOG = " + dec.format(sumOfWeightsOG))
             logger.info("games for round $round: {}", games.toString())
 
             // Compare weights with OpenGotha if legacy mode
             if (legacy) {
-                assertTrue(compare_weights(getOutputFile("weights.txt"), getTestFile("opengotha/$name/$name"+"_weights_R$round.txt")), "Not matching opengotha weights for round $round")
+                assertTrue(compare_weights(outputFile, getTestFile("opengotha/$name/$name"+"_weights_R$round.txt")), "Not matching opengotha weights for round $round")
             }
 
             if (round in forcePairing) {
@@ -223,7 +220,7 @@ class PairingTests: TestBase() {
                     val gameOG = pairingsOG[round - 1].getJson(i)!!.asObject()// ["r"] as String?
                     val whiteId = gameOG["w"] as Long?
                     val blackId = gameOG["b"] as Long?
-                    TestAPI.put("/api/tour/$id/pair/$round", Json.parse("""{"id":$gameID,"w":$whiteId,"b":$blackId}""")).asObject()
+                    TestAPI.put("/api/tour/$id/pair/$round?legacy=$legacy&weights_output=$outputFile&append=true", Json.parse("""{"id":$gameID,"w":$whiteId,"b":$blackId}""")).asObject()
                     }
                 games = TestAPI.get("/api/tour/$id/res/$round").asArray()
             }
@@ -273,11 +270,10 @@ class PairingTests: TestBase() {
 
     @Test
     fun `SwissTest simpleSwiss`() {
-        BaseSolver.legacy_mode = true
         // read tournament with pairing
-        var file = getTestFile("opengotha/pairings/simpleswiss.xml")
-        logger.info("read from file $file")
-        val resource = file.readText(StandardCharsets.UTF_8)
+        var tourFile = getTestFile("opengotha/pairings/simpleswiss.xml")
+        logger.info("read from file $tourFile")
+        val resource = tourFile.readText(StandardCharsets.UTF_8)
         var resp = TestAPI.post("/api/tour", resource)
         val id = resp.asObject().getInt("id")
         val tournament = TestAPI.get("/api/tour/$id").asObject()
@@ -315,10 +311,10 @@ class PairingTests: TestBase() {
         var firstGameID: Int
 
         for (round in 1..7) {
-            BaseSolver.weightsLogger = PrintWriter(FileWriter(getOutputFile("weights.txt")))
-            games = TestAPI.post("/api/tour/$id/pair/$round", Json.Array("all")).asArray()
+            val outputFile = getOutputFile("weights.txt")
+            games = TestAPI.post("/api/tour/$id/pair/$round?legacy=true&weights_output=$outputFile", Json.Array("all")).asArray()
             logger.info("games for round $round: {}", games.toString().slice(0..50) + "...")
-            assertTrue(compare_weights(getOutputFile("weights.txt"), getTestFile("opengotha/simpleswiss/simpleswiss_weights_R$round.txt")), "Not matching opengotha weights for round $round")
+            assertTrue(compare_weights(outputFile, getTestFile("opengotha/simpleswiss/simpleswiss_weights_R$round.txt")), "Not matching opengotha weights for round $round")
             assertTrue(compare_games(games, Json.parse(pairingsOG[round - 1])!!.asArray()),"pairings for round $round differ")
             logger.info("Pairings for round $round match OpenGotha")
 
@@ -354,12 +350,12 @@ class PairingTests: TestBase() {
     @Test
     fun `SwissTest KPMCSplitbug`() {
         // Let pairgoth use the legacy asymmetric detRandom()
-        BaseSolver.legacy_mode = true
+        val legacy = true
         // read tournament with pairing
         val name = "20240921-KPMC-Splitbug"
-        val file = getTestFile("opengotha/pairings/$name.xml")
-        logger.info("read from file $file")
-        val resource = file.readText(StandardCharsets.UTF_8)
+        val tourFile = getTestFile("opengotha/pairings/$name.xml")
+        logger.info("read from file $tourFile")
+        val resource = tourFile.readText(StandardCharsets.UTF_8)
         var resp = TestAPI.post("/api/tour", resource)
         val id = resp.asObject().getInt("id")
         val tournament = TestAPI.get("/api/tour/$id").asObject()
@@ -387,13 +383,13 @@ class PairingTests: TestBase() {
 
         var games: Json.Array
         var firstGameID: Int
+        val outputFile = getOutputFile("weights.txt")
 
         for (round in minRound..maxRound) {
             val sumOfWeightsOG = compute_sumOfWeight_OG(getTestFile("opengotha/$name/$name" + "_weights_R$round.txt"), pairingsOG[round - minRound], players)
 
-            BaseSolver.weightsLogger = PrintWriter(FileWriter(getOutputFile("weights.txt")))
             // Call Pairgoth pairing solver to generate games
-            games = TestAPI.post("/api/tour/$id/pair/$round", Json.Array("all")).asArray()
+            games = TestAPI.post("/api/tour/$id/pair/$round?legacy=$legacy&weights_ouput=$outputFile&append=${round > 1}", Json.Array("all")).asArray()
             
             logger.info("sumOfWeightOG = " + dec.format(sumOfWeightsOG))
             logger.info("games for round $round: {}", games.toString().slice(0..50) + "...")
@@ -401,7 +397,7 @@ class PairingTests: TestBase() {
             // Compare weights with OpenGotha
             assertTrue(
                 compare_weights(
-                    getOutputFile("weights.txt"),
+                    outputFile,
                     getTestFile("opengotha/$name/$name" + "_weights_R$round.txt")
                 ), "Not matching opengotha weights for round $round"
             )

api-webapp/src/test/kotlin/TestUtils.kt

@@ -7,6 +7,8 @@ import org.jeudego.pairgoth.server.SSEServlet
 import org.jeudego.pairgoth.server.WebappManager
 import org.mockito.kotlin.*
 import java.io.*
+import java.net.URL
+import java.net.URLDecoder
 import java.nio.charset.StandardCharsets
 import java.util.*
 import javax.servlet.ReadListener
@@ -21,20 +23,45 @@ object TestAPI {
 
     fun Any?.toUnit() = Unit
 
+    fun parseURL(url: String): Pair<String, Map<String, String>> {
+        val qm = url.indexOf('?')
+        if (qm == -1) {
+            return url to emptyMap()
+        }
+        val uri = url.substring(0, qm)
+        val params = url.substring(qm + 1)
+            .split('&')
+            .map { it.split('=') }
+            .mapNotNull {
+                when (it.size) {
+                    1 -> it[0].decodeUTF8() to ""
+                    2 -> it[0].decodeUTF8() to it[1].decodeUTF8()
+                    else -> null
+                }
+            }
+            .toMap()
+        return uri to params
+    }
+
+    private fun String.decodeUTF8() = URLDecoder.decode(this, "UTF-8") // decode page=%22ABC%22 to page="ABC"
+
     private val apiServlet = ApiServlet()
     private val sseServlet = SSEServlet()
 
-    private fun <T> testRequest(reqMethod: String, uri: String, accept: String = "application/json", payload: T? = null): String {
+    private fun <T> testRequest(reqMethod: String, url: String, accept: String = "application/json", payload: T? = null): String {
 
         WebappManager.properties["auth"] = "none"
         WebappManager.properties["store"] = "memory"
         WebappManager.properties["webapp.env"] = "test"
 
+        val (uri, parameters) = parseURL(url)
+
         // mock request
         val myHeaderNames = if (reqMethod == "GET") emptyList() else listOf("Content-Type")
         val selector = argumentCaptor<String>()
         val subSelector = argumentCaptor<String>()
         val reqPayload = argumentCaptor<String>()
+        val parameter = argumentCaptor<String>()
         val myInputStream = payload?.let { DelegatingServletInputStream(payload.toString().byteInputStream(StandardCharsets.UTF_8)) }
         val myReader = payload?.let { BufferedReader(StringReader(payload.toString())) }
         val req = mock<HttpServletRequest> {
@@ -59,6 +86,7 @@ object TestAPI {
             }
             on { headerNames } doReturn Collections.enumeration(myHeaderNames)
             on { getHeader(eq("Accept")) } doReturn accept
+            on { getParameter(parameter.capture()) } doAnswer { parameters[parameter.lastValue] }
         }
 
         // mock response
@@ -77,7 +105,7 @@ object TestAPI {
             "DELETE" -> apiServlet.doDelete(req, resp)
         }
 
-        return buffer.toString() ?: throw Error("no response payload")
+        return buffer.toString()
     }
 
     fun get(uri: String): Json = Json.parse(testRequest<Void>("GET", uri)) ?: throw Error("no payload")

build.sh

@@ -0,0 +1,23 @@
+mkdir pairgoth
+cp application/target/pairgoth-engine.jar pairgoth/
+
+echo "#!/bin/bash" > pairgoth/run.sh
+echo "./jdk-11.0.28+6-jre/bin/java -jar pairgoth-engine.jar" >> pairgoth/run.sh
+
+echo "#!/bin/bash" > pairgoth/get_java.sh
+echo "wget https://github.com/adoptium/temurin11-binaries/releases/download/jdk-11.0.28%2B6/OpenJDK11U-jre_x64_linux_hotspot_11.0.28_6.tar.gz" >> pairgoth/get_java.sh
+echo "tar -xzf OpenJDK11U-jre_x64_linux_hotspot_11.0.28_6.tar.gz" >> pairgoth/get_java.sh
+
+chmod +x pairgoth/run.sh
+chmod +x pairgoth/get_java.sh
+
+
+echo ""                                   > pairgoth/pairgoth.properties
+echo "webapp.env = prod"                  >> pairgoth/pairgoth.properties
+echo "webapp.url = http://localhost:8080" >> pairgoth/pairgoth.properties
+echo "auth = none"                        >> pairgoth/pairgoth.properties
+echo "logger.level = info"                >> pairgoth/pairgoth.properties
+echo "rating.ffg.enable = false"          >> pairgoth/pairgoth.properties
+echo "webapp.protocol = http"             >> pairgoth/pairgoth.properties
+
+tar -czvf pairgoth.tar.gz pairgoth/

view-webapp/src/main/sass/explain.scss

@@ -0,0 +1,143 @@
+@layer pairgoth {
+  /* explain section */
+
+  #pairing-table-wrapper {
+    padding: 8em 2em 1em 2em;
+  }
+  #pairing-table {
+    border-collapse: collapse;
+    width: max-content;
+    thead {
+      //border-collapse: collapse;
+      tr {
+        &:first-child {
+          min-height: 8rem;
+          th:first-child {
+            background: linear-gradient(to right top, #ffffff 0%,#ffffff 49.9%,#000000 50%,#000000 51%,#ffffff 51.1%,#ffffff 100%);
+            position: relative;
+            min-width: 8rem;
+            label.top-right {
+              position: absolute;
+              top: 0;
+              right: 0;
+            }
+            label.bottom-left {
+              position: absolute;
+              bottom: 0;
+              left: 0;
+            }
+          }
+          th:not(:first-child) {
+            z-index: 5;
+            width: 55px;
+            height: 140px;
+            white-space: nowrap;
+            padding-bottom: 10px;
+            position: relative;
+            > div {
+              transform: translate(35px, 51px) rotate(315deg);
+              width: 30px;
+              &:hover {
+                cursor: pointer;
+                > span {
+                  background-color: rgba(0, 0, 255, 0.2) !important;
+                }
+              }
+              > span {
+                border-bottom: 1px solid gray;
+                padding: 5px 10px;
+              }
+            }
+            > pre {
+              display: none;
+              font-size: smaller;
+              line-height: 1em;
+              text-align: left;
+              position: absolute;
+              pointer-events: none;
+              top: 100%;
+              left: 100%;
+              background-color: rgba(255, 255, 255, 0.7);
+            }
+            &:hover {
+              cursor: pointer;
+              > pre {
+                display: block;
+                z-index: 10;
+              }
+            }
+          }
+        }
+      }
+    }
+    tbody {
+      tr {
+        th {
+          text-align: left;
+          padding-right: 1em;
+          position: relative;
+          > pre {
+            display: none;
+            font-size: smaller;
+            line-height: 1em;
+            text-align: left;
+            position: absolute;
+            pointer-events: none;
+            top: 100%;
+            left: 100%;
+            background-color: rgba(255, 255, 255, 0.7);
+          }
+          &:hover {
+            cursor: pointer;
+            background-color: rgba(0, 0, 255, 0.2) !important;
+            pre {
+              display: block;
+              z-index: 10;
+            }
+          }
+        }
+        td {
+          height: 55px;
+          width: 55px;
+          border: solid 1px gray;
+          position: relative;
+          &.game::after {
+            position: absolute;
+            content: "X";
+            color: blue;
+            text-align: center;
+            top: 50%;
+            transform: translateY(-50%);
+            bottom: 0;
+            left: 0;
+            right: 0;
+          }
+          .weights {
+            display: none;
+            font-size: smaller;
+            line-height: 1em;
+            text-align: left;
+            position: absolute;
+            pointer-events: none;
+            top: 100%;
+            left: 100%;
+            background-color: rgba(255, 255, 255, 0.7);
+          }
+          &:hover {
+            background-color: rgba(0, 0, 255, 0.7) !important;
+            cursor: pointer;
+            .weights {
+              display: block;
+              z-index: 10;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  #captures {
+    padding: 1em;
+  }
+}
+

view-webapp/src/main/sass/main.scss

@@ -56,6 +56,10 @@
     font-style: italic;
   }
 
+  .strong {
+    font-weight: bold;
+  }
+
   /* header, center, footer */
   
   #header {
@@ -566,7 +570,7 @@
     }
 
     /* TODO - plenty of those elements could just use the .noprint class */
-    #header, #logo, #lang, .steps, #filter-box, #reglist-mode, #footer, #unpairables, #pairing-buttons, button, #standings-params, #logout, .pairing-stats, .result-sheets, .toggle, #overview, .tables-exclusion, .button, .noprint {
+    #header, #logo, #lang, .steps, #filter-box, #reglist-mode, #footer, #unpairables, #pairing-buttons, button, #standings-params, #logout, .pairing-stats, .pairing-post-actions, .toggle, #overview, .tables-exclusion, .button, .noprint {
       display: none !important;
     }
 

view-webapp/src/main/sass/tour.scss

@@ -377,6 +377,9 @@
         width: 6em;
       }
     }
+    &:empty + .pairing-post-actions {
+      display: none;
+    }
   }
   #print-pairables {
     width: 100%;
@@ -418,8 +421,10 @@
     padding: 0.2em 0.8em;
   }
 
-  .result-sheets {
+  .pairing-post-actions {
     margin-top: 0.2em;
+    display: flex;
+    justify-content: space-around;
   }
 
   .bottom-pairing-actions {

view-webapp/src/main/webapp/WEB-INF/translations/fr

@@ -184,7 +184,7 @@ unpairable,	non disponibles,
 supports the	implémente le système d’appariement
 white	blanc
 White	Blanc
-white vs. black	blanc vs. Noir
+white vs. black	Blanc vs. Noir
 confirmed.	confirmé(s).
 Note that login to this instance is reserved to French federation actors plus several external people at our discretion. Send us	La connexion à cette instance est réservée aux acteurs de la FFG et à quelques personnes extérieures, à notre discrétion. Envoyez-nous
 yyyymmdd-city	aaaammjj-ville

view-webapp/src/main/webapp/explain.html

@@ -0,0 +1,115 @@
+#macro(rank $rank)#if( $rank<0 )#set( $k = -$rank )${k}k#else#set( $d=$rank+1 )${d}d#end#end
+#if (!$tour)
+<div class="section">
+  <h2 class="error">Invalid tournament id</h2>
+</div>
+#stop
+#end
+#set($round = $math.toInteger($!params.round))
+#if(!$round)
+  #set($round = 1)
+#else
+  #set($round = $math.min($math.max($round, 1), $tour.rounds))
+#end
+#if($tour.type == 'INDIVIDUAL' || $tour.type.startsWith('TEAM'))
+  #set($parts = $api.get("tour/${params.id}/part"))
+#else
+  #set($parts = $api.get("tour/${params.id}/team"))
+#end
+#set($pmap = $utils.toMap($parts))
+#set($roundPairing = $api.get("tour/${params.id}/pair/$round"))
+#if($roundPairing.error)
+<script type="text/javascript">
+  onLoad(() => {
+    showError("$roundPairing.error")
+  });
+</script>
+  #stop
+#end
+#set($explain = $api.get("tour/${params.id}/explain/$round"))
+<div id="pairing-table-wrapper">
+  <table id="pairing-table">
+    <thead>
+      <tr>
+        <th>
+          <label class="top-right">white</label>
+          <label class="bottom-left">black</label>
+        </th>
+#foreach($white in $explain.paired)
+        <th data-white="$white.id">
+          <div>
+            <span>
+              $white.name $white.firstname
+            </span>
+          </div>
+          <pre>$white.toPrettyString()</pre>
+        </th>
+#end
+      </tr>
+    </thead>
+    <tbody>
+#foreach($black in $explain.paired)
+      <tr>
+        <th data-black="$black.id">
+          <div>
+            <span>
+              $black.name $black.firstname
+            </span>
+          </div>
+          <pre>$black.toPrettyString()</pre>
+        </th>
+  #foreach($white in $explain.paired)
+    #if($white.id != $black.id)
+      #set($key = "$white.id-$black.id")
+      #set($weights = $explain.weights[$key])
+      #if($weights)
+        #set($toMax = $explain.max - $weights.total)
+        #set($toMin = $weights.total - $explain.min)
+        #if ($toMax > $toMin)
+          ## total is close to min
+          #set($percent = ($weights.total - $explain.min) / ($explain.low - $explain.min) * 40)
+        #else
+          ## total is close to max
+          #set($percent = 60 + 40 * (1 - ($explain.max - $weights.total) / ($explain.max - $explain.high)) )
+        #end
+      #end
+      #set($game = $explain.games[$key])
+        <td data-wb="$white.id-$black.id" #if($game)class="game"#end #if($weights)style="background-color: color-mix(in srgb, rgb(0 255 0) ${percent}%, rgb(255 0 0));"#end>
+          <div class="weights">
+            <pre>#if($weights)$weights.toPrettyString()#{else}Bye Player#end</pre>
+          </div>
+        </td>
+    #else
+        <td></td>
+    #end
+  #end
+      </tr>
+#end
+    </tbody>
+  </table>
+</div>
+<div id="captures"></div>
+<script type="text/javascript">
+  // #[[
+  onLoad(() => {
+    $('#header').hide();
+    $('td').on('click', e => {
+      const td = e.target.closest('td');
+      const ids = td.data('wb')?.split(/-/);
+      if (ids) {
+        const white = $(`th[data-white="${ids[0]}"] div span`)?.text();
+        const black = $(`th[data-white="${ids[1]}"] div span`)?.text();
+        const weights = td.find('.weights pre').text();
+        const captures = $('#captures')[0];
+        captures.insertAdjacentHTML('beforeend', `<div>${white} vs ${black}<pre>${weights}</pre></div>`);
+      }
+    })
+    $('th[data-white], th[data-black]').on('click', e => {
+      const th = e.target.closest('th');
+      const name = th.find('span').text();
+      const info = th.find('pre').text();
+      captures.insertAdjacentHTML('beforeend', `<div>${name}<pre>${info}</pre></div>`);
+    });
+  });
+  // ]]#
+</script>

view-webapp/src/main/webapp/result-sheets.html

@@ -1,8 +1,8 @@
-#macro(rank $rank)#if( $rank<0 )#set( $k = -$rank )${k}k#else#set( $d=$rank+1 )${d}d#end#end
 #if (!$tour)
 <div class="section">
   <h2 class="error">Invalid tournament id</h2>
 </div>
+#stop
 #end
 #set($round = $math.toInteger($!params.round))
 #if(!$round)
@@ -27,60 +27,36 @@
   #stop
 #end
 #set($games = $utils.removeBye($roundPairing.games))
-#set($pages = ($games.size() + 3) / 4)
-#set($items = $pages * 4)
-#foreach($i in [1..$items])
-  #set($j = ($i - 1) / 4 + (($i - 1) % 4) * $pages)
-  #if($j < $games.size())
-    #set($game = $games[$j])
+
+<table>
+  <tr>
+    <th>Table</th>
+    <th>Black</th>
+    <th>White</th>
+    <th>Handicap</th>
+    <th>Komi</th>
+  </tr>
+  
+#set($numOfPlay = $games.size() - 1)
+#foreach($i in [0..$numOfPlay])
+  
+  #set($game = $games[$i])
   #set($white = $pmap[$game.w])
   #set($black = $pmap[$game.b]) 
-  #else
-    #set($game = { 't': 'xxx', 'h': 'xxx' })
-    #set($white = { 'name': 'xxx', 'firstname': 'xxx', 'rank': -99, 'country': 'XX', 'club': 'xxx' })
-    #set($black = { 'name': 'xxx', 'firstname': 'xxx', 'rank': -99, 'country': 'XX', 'club': 'xxx' })
-  #end
-  #if($foreach.index % 4 == 0)
-  <div class="page">
-  #end
-
-    <div class="page-item">
-      <div class="title">$tour.name</div>
-      <div class="subtitle"></div>
-      <div class="details">
-        <div>Table $game.t</div>
   #set($komi = $tour.komi)
   #if($game.h) #set($komi = $komi - $math.floor($komi)) #end
-        <div>Handicap $game.h &nbsp;&dash;&nbsp; Komi $komi</div>
-        <div>Round $round</div>
-      </div>
-      <div class="instructions">
-        Surround winner's name or ½-½
-      </div>
-      <div class="players">
-        <div class="white player">
-          <div class="color">White</div>
-          <div class="name">$white.name $!white.firstname #rank($white.rank)<br/>#if($white.country)($white.country.toUpperCase()#if($white.club), $white.club#end)#end</div>
-##          <div class="pin">$white.egf</div>
-        </div>
-        <div class="equal">½-½</div>
-        <div class="black player">
-          <div class="color">Black</div>
-          <div class="name">$black.name $!black.firstname #rank($black.rank)<br/>#if($black.country)($black.country.toUpperCase()#if($black.club), $black.club#end)#end</div>
-##          <div class="pin">$black.egf</div>
-        </div>
-      </div>
-      <div class="signatures">
-        <div class="signature">Signature:</div>
-        <div class="equal">&nbsp;&nbsp;&nbsp;</div>
-        <div class="signature">Signature:</div>
-      </div>
-    </div>
-
-  #if($foreach.index % 4 == 3)
-  </div>
-  #end
+  #set($table = $i + 1)
+  <tr>
+    <td>Table $table</td>
+    <td>$black.name $!black.firstname</td>
+    <td>$white.name $!white.firstname</td>
+    <td>$game.h</td>
+    <td>$komi</td>
+  </tr>
 #end
+
+</table>
+
 </div>
 <script type="text/javascript">
   onLoad(() => {

view-webapp/src/main/webapp/tour-pairing.inc.html

@@ -69,7 +69,7 @@
           </button>
         </div>
         <div>
-          <div id="paired" class="multi-select" title="white vs. black">
+          <div id="paired" class="multi-select" title="white vs. black">##
 #foreach($game in $games)
   #set($white = $pmap[$game.w])
   #set($black = $pmap[$game.b])
@@ -80,10 +80,13 @@
               <div class="black" data-id="$game.b">#if($black)$black.name#if($black.firstname) $black.firstname#end#{else}BIP#end</div>
               <div class="handicap" data-value="$game.h">#if($game.h)h$game.h#{else}&nbsp;#end</div>
             </div>
-#end
-          </div>
+#end##
+#*      *#</div>
 #if(!$tour.type.startsWith('TEAM'))
-          <div class="result-sheets"><a href="result-sheets?id=${tour.id}&round=${round}" target="_blank" class="ui mini floating icon button">result sheets <i class="fa fa-external-link"></i></a></div>
+          <div class="pairing-post-actions">
+            <a href="result-sheets?id=${tour.id}&round=${round}" target="_blank" class="ui mini floating icon button">result sheets <i class="fa fa-external-link"></i></a>
+            <a href="explain?id=${tour.id}&round=${round}" target="_blank" class="ui mini floating icon button">explain pairing <i class="fa fa-external-link"></i></a>
+          </div>
 #end
         </div>
       </div>

view-webapp/src/main/webapp/tour-results.inc.html

@@ -18,21 +18,21 @@
     <table id="results-table" class="ui celled striped table">
       <thead class="centered">
         <th data-sort-method="number">table</th>
-        <th>white</th>
         <th>black</th>
+        <th>white</th>
         <th>hd</th>
         <th>result</th>
       </thead>
       <tbody>
-#set($dispRst = {'?':'?', 'w':'1-0', 'b':'0-1', '=':'½-½', 'X':'X', '#':'1-1', '0':'0-0'})
+#set($dispRst = {'?':'?', 'w':'0-1', 'b':'1-0', '=':'½-½', 'X':'X', '#':'1-1', '0':'0-0'})
 #foreach($game in $individualGames)
   #set($white = $plmap[$game.w])
   #set($black = $plmap[$game.b])
   #if($black && $white)
         <tr id="result-$game.id" data-id="$game.id">
           <td data-sort="$game.t">${game.t}.</td>
-          <td class="white player #if($game.r == 'w' || $game.r == '#') winner #elseif($game.r == 'b' || $game.r == '0') looser #end" data-id="$white.id" data-sort="$white.name#if($white.firstname) $white.firstname#end"><span>#if($white)$white.name#if($white.firstname) $white.firstname#end #rank($white.rank)#{else}BIP#end</span></td>
           <td class="black player #if($game.r == 'b' || $game.r == '#') winner #elseif($game.r == 'w' || $game.r == '0') looser #end" data-id="$black.id" data-sort="$black.name#if($black.firstname) $black.firstname#end"><span>#if($black)$black.name#if($black.firstname) $black.firstname#end #rank($black.rank)#{else}BIP#end</span></td>
+          <td class="white player #if($game.r == 'w' || $game.r == '#') winner #elseif($game.r == 'b' || $game.r == '0') looser #end" data-id="$white.id" data-sort="$white.name#if($white.firstname) $white.firstname#end"><span>#if($white)$white.name#if($white.firstname) $white.firstname#end #rank($white.rank)#{else}BIP#end</span></td>
           <td class="handicap centered">$!game.h</td>
           <td class="result centered" data-sort="$game.r" data-result="$game.r">$dispRst[$game.r]</td>
         </tr>

view-webapp/src/main/webapp/tour-standings.inc.html

@@ -30,6 +30,9 @@
       </div>
     </form>
   </div>
+#if($tour.type.startsWith('TEAM'))
+  <div class="strong">Team Standings</div>
+#end
   <div id="standings-container" class="roundbox">
 #set($standings = $api.get("tour/${params.id}/standings/$round"))
 #if($standings.isObject() && ($standings.error || $standings.message))
@@ -105,6 +108,78 @@
       </tbody>
     </table>
   </div>
+#if($tour.type.startsWith('TEAM'))
+  <div class="strong">Individual Standings</div>
+  <div id="individual-standings-container" class="roundbox">
+#set($indvstandings = $api.get("tour/${params.id}/standings/$round?individual_standings=true"))
+#if($indvstandings.isObject() && ($indvstandings.error || $indvstandings.message))
+  #if($indvstandings.error)
+    #set($error = $indvstandings.error)
+  #else
+    #set($error = $indvstandings.message)
+  #end
+    <script type="text/javascript">
+      onLoad(() => {
+        showError("$error")
+      });
+    </script>
+  #set($indvstandings = [])
+#end
+#set($indvsmap = {})
+#foreach($part in $indvstandings)
+  #set($indvsmap[$part.num] = $part)
+#end
+    <table id="individual-standings-table" class="ui striped table">
+      <thead>
+        <th>Num</th>
+        <th>Plc</th>
+        <th>Name</th>
+        <th>Rank</th>
+        <th>Ctr</th>
+        <th>Nbw</th>
+#foreach($r in [1..$round])
+        <th>R$r</th>
+#end
+#set($indvcriteres = ['NBW'])
+#foreach($crit in $indvcriteres)
+        <th>$crit</th>
+#end
+      </thead>
+      <tbody>
+#foreach($part in $indvstandings)
+        <tr data-id="$part.id">
+          <td>$part.num</td>
+          <td>$part.place</td>
+          <td>$esc.html($part.name)#if($part.firstname) $esc.html($part.firstname)#end</td>
+          <td data-sort="$part.rank">#rank($part.rank)</td>
+          <td>#if($part.country)$part.country#end</td>
+          <td>$number.format('0.#', $part.NBW)</td>
+  #set($mx = $round - 1)
+  #foreach($r in [0..$mx])
+    #set($rst = $part.results[$r])
+    #set($opp_num = $math.toLong($rst))
+    #if($opp_num)
+      #set($opponent = $!indvsmap[$opp_num])
+    #else
+      #set($opponent = false)
+    #end
+    #if($rst.contains('+'))
+      #set($rst = "<b>$rst</b>")
+    #elseif($rst.contains('-'))
+      #set($rst = "<i>$rst</i>")
+    #end
+          <td class="nobreak game-result" #if($opponent)title="$esc.html($opponent.name)#if($opponent.firstname) $esc.html($opponent.firstname)#end #rank($opponent.rank)#if($opponent.country) $opponent.country#end"#end>$rst</td>
+  #end
+  #foreach($crit in $indvcriteres)
+    #set($value = "$number.format('0.#', $part[$crit])")
+          <td data-sort="$value">$value.replace('.5', '½')</td>
+  #end
+        </tr>
+#end
+      </tbody>
+    </table>
+  </div>
+#end
   <div class="right form-actions">
 #if(!$tour.frozen && $round == $tour.rounds)
     <button id="freeze" class="ui orange floating right labeled icon button">