new default glicko values: deviation=600, volatility=0.1

modules/lobby/src/main/Hook.scala

@@ -93,7 +93,7 @@ case class Hook(
       member = lila.pool.PoolMember(
         userId = user.??(_.id),
         sri = sri,
-        rating = rating | lila.rating.Glicko.defaultIntRating,
+        rating = rating | lila.rating.Glicko.default.intRating,
         ratingRange = realRatingRange,
         lame = user.??(_.lame),
         blocking = lila.pool.PoolMember.BlockedUsers(user.??(_.blocking)),

modules/lobby/src/main/LobbyUser.scala

@@ -42,5 +42,5 @@ case class LobbyPerf(rating: Int, provisional: Boolean)
 
 object LobbyPerf {
 
-  val default = LobbyPerf(Glicko.defaultIntRating, provisional = true)
+  val default = LobbyPerf(Glicko.default.intRating, provisional = true)
 }

modules/rating/src/main/Glicko.scala

@@ -62,19 +62,11 @@ case object Glicko {
 
   val minRating = 600
 
-  val default = Glicko(1500d, 500d, 0.08d)
-
-  // managed is for students invited to a class
-  val defaultManaged       = Glicko(900d, 500d, 0.08d)
-  val defaultManagedPuzzle = Glicko(800d, 500d, 0.08d)
-
-  val defaultIntRating = default.rating.toInt
-
   val minDeviation              = 45
   val variantRankableDeviation  = 65
   val standardRankableDeviation = 75
   val provisionalDeviation      = 110
-  val maxDeviation              = 350
+  val maxDeviation              = 600d
 
   // past this, it might not stabilize ever again
   val maxVolatility = 0.1d
@@ -82,6 +74,12 @@ case object Glicko {
   // Chosen so a typical player's RD goes from 60 -> 110 in 1 year
   val ratingPeriodsPerDay = 0.21436d
 
+  val default = Glicko(1500d, maxDeviation, maxVolatility)
+
+  // managed is for students invited to a class
+  val defaultManaged       = Glicko(900d, maxDeviation, maxVolatility)
+  val defaultManagedPuzzle = Glicko(800d, maxDeviation, maxVolatility)
+
   val tau    = 0.75d
   val system = new RatingCalculator(default.volatility, tau, ratingPeriodsPerDay)