diff --git a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Game.kt b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Game.kt
index 8bae5b3..252f7cb 100644
--- a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Game.kt
+++ b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Game.kt
@@ -28,6 +28,10 @@ data class Game(
             fun fromSymbol(c: Char) = byChar[c] ?: throw Error("unknown result symbol: $c")
         }
     }
+
+    fun bipPlayed(): Boolean {
+        return white == ByePlayer.id ||black == ByePlayer.id
+    }
 }
 
 // serialization
diff --git a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairing.kt b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairing.kt
index 9f52d14..f287b27 100644
--- a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairing.kt
+++ b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/model/Pairing.kt
@@ -40,8 +40,8 @@ data class MainCritParams(
     val scoreWeight: Double = MAX_SCORE_WEIGHT, // opengotha minimizeScoreDifference
     val drawUpDownWeight: Double = MAX_DRAW_UP_DOWN_WEIGHT, // opengotha DUDDWeight
     val compensateDrawUpDown: Boolean = true,
-    val drawUpDownUpperMode: DrawUpDown = DrawUpDown.MIDDLE,
-    val drawUpDownLowerMode: DrawUpDown = DrawUpDown.MIDDLE,
+    val drawUpDownUpperMode: DrawUpDown = DrawUpDown.BOTTOM,
+    val drawUpDownLowerMode: DrawUpDown = DrawUpDown.TOP,
     val seedingWeight: Double = MAX_SEEDING_WEIGHT, // 5 *10^6, opengotha maximizeSeeding
     val lastRoundForSeedSystem1: Int = 1,
     val seedSystem1: SeedMethod = SeedMethod.SPLIT_AND_RANDOM,
diff --git a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/HistoryHelper.kt b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/HistoryHelper.kt
index 2fd5127..04e5608 100644
--- a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/HistoryHelper.kt
+++ b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/HistoryHelper.kt
@@ -5,6 +5,11 @@ import org.jeudego.pairgoth.model.Game.Result.*
 
 open class HistoryHelper(protected val history: List<List<Game>>, scoresGetter: HistoryHelper.()-> Map<ID, Double>) {
 
+    // List of all the pairables ID present in the history
+    val allPairables = history.flatten()
+        .map { game -> listOf(game.white, game.black) }
+        .flatten().distinct()
+
     private val Game.blackScore get() = when (result) {
         BLACK, BOTHWIN -> 1.0
         else -> 0.0
diff --git a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/BaseSolver.kt b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/BaseSolver.kt
index 6a0603a..1589b68 100644
--- a/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/BaseSolver.kt
+++ b/api-webapp/src/main/kotlin/org/jeudego/pairgoth/pairing/solver/BaseSolver.kt
@@ -392,14 +392,14 @@ sealed class BaseSolver(
                 }
             }
 
-            if(true){
-                println("Names "+p1.nameSeed()+" "+p1.group+"   "+p2.nameSeed()+" "+p2.group)
-                println("Seed Sytem = " + currentSeedSystem.toString())
-                println("groupsize = "+p1.placeInGroup.second.toString()+"   "+p2.placeInGroup.second.toString()+"  "+groupSize)
-                println("place in group p1 = "+cla1.toString()+"  p2 = "+cla2.toString())
-                println("score = " + Math.round(score).toString())
-                println("detrandom(p1,p2) = " + (maxSeedingWeight-detRandom(seedingWeight*0.2, p1, p2)).toString())
-            }
+//            if(true){
+//                println("Names "+p1.nameSeed()+" "+p1.group+"   "+p2.nameSeed()+" "+p2.group)
+//                println("Seed Sytem = " + currentSeedSystem.toString())
+//                println("groupsize = "+p1.placeInGroup.second.toString()+"   "+p2.placeInGroup.second.toString()+"  "+groupSize)
+//                println("place in group p1 = "+cla1.toString()+"  p2 = "+cla2.toString())
+//                println("score = " + Math.round(score).toString())
+//                println("detrandom(p1,p2) = " + (maxSeedingWeight-detRandom(seedingWeight*0.2, p1, p2)).toString())
+//            }
         }
         return Math.round(score).toDouble()
     }