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AI play book: only decent moves

deepcrayonfish^2
Thibault Duplessis 2021-11-24 08:12:58 +01:00
parent 9ef8924fa4
commit 30e6aa705f
1 changed files with 11 additions and 8 deletions
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19
modules/fishnet/src/main/FishnetOpeningBook.scala
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@ -2,7 +2,7 @@ package lila.fishnet
import chess.format.Forsyth import chess.format.Forsyth
import chess.format.Uci import chess.format.Uci
import chess.Speed import chess.{ Color, Speed }
import com.softwaremill.tagging._ import com.softwaremill.tagging._
import play.api.libs.json._ import play.api.libs.json._
import play.api.libs.ws.JsonBodyReadables._ import play.api.libs.ws.JsonBodyReadables._
@ -45,7 +45,7 @@ final private class FishnetOpeningBook(
for { for {
data <- res.body[JsValue].validate[Response](responseReader).asOpt data <- res.body[JsValue].validate[Response](responseReader).asOpt
_ = if (data.moves.isEmpty) outOfBook.put(game.id) _ = if (data.moves.isEmpty) outOfBook.put(game.id)
move <- data.randomPonderedMove move <- data randomPonderedMove game.turnColor
} yield move.uci } yield move.uci
} }
.monTry { res => .monTry { res =>
@ -66,11 +66,13 @@ object FishnetOpeningBook {
trait Depth trait Depth
case class Response(moves: List[Move]) { case class Response(moves: List[Move]) {
def randomPonderedMove: Option[Move] = {
val sum = moves.map(_.nb).sum def randomPonderedMove(turn: Color): Option[Move] = {
val novelty = 1 val decentMoves = moves.filter(_.lossRatioFor(turn) < 0.66)
val rng = ThreadLocalRandom.nextInt(sum + novelty) val sum = decentMoves.map(_.nb).sum
moves val novelty = 1
val rng = ThreadLocalRandom.nextInt(sum + novelty)
decentMoves
.foldLeft((none[Move], 0)) { case ((found, it), next) => .foldLeft((none[Move], 0)) { case ((found, it), next) =>
val nextIt = it + next.nb val nextIt = it + next.nb
(found orElse (nextIt > rng).option(next), nextIt) (found orElse (nextIt > rng).option(next), nextIt)
@ -80,7 +82,8 @@ object FishnetOpeningBook {
} }
case class Move(uci: Uci, white: Int, draws: Int, black: Int) { case class Move(uci: Uci, white: Int, draws: Int, black: Int) {
def nb = white + draws + black def nb = white + draws + black
def lossRatioFor(color: Color): Float = (nb > 0) ?? color.fold(black, white).toFloat / nb
} }
implicit val moveReader = Json.reads[Move] implicit val moveReader = Json.reads[Move]