Add more perft tests for Chess960 castles

[lenguyenthanh]

Add more perf tests from

• https://www.chessprogramming.org/Chess960_Perft_Results
• https://github.com/AndyGrant/Ethereal/blob/master/src/perft/fischer.epd

[lenguyenthanh]

script to convert pert files using scala-cli.
It looks pretty nice, so I post it here 😆

//> using scala "3.2.1"
//> using lib "co.fs2::fs2-core:3.5.0"
//> using lib "co.fs2::fs2-io:3.5.0"
//> using lib "org.typelevel::cats-effect:3.4.5"

import cats.effect.{IO, IOApp}
import fs2.{Stream, text}
import fs2.io.file.{Files, Path}

object Converter extends IOApp.Simple:

  val converter: Stream[IO, Unit] =
    def raw2Perft(id: Long, raw: String): String =
      val builder = StringBuilder(s"id $id\n")
      val list = raw.split(";").toList
      builder.append(s"epd ${list(0)}\n")
      for(i <- 1 to 6) {
        val size = list(i).split(" ")(1)
        builder.append(s"perft $i $size\n")
      }
      builder.toString

    Files[IO].readUtf8Lines(Path("raw.txt"))
      .filter(s => !s.trim.isEmpty)
      .zipWithIndex
      .map((x, i) => raw2Perft(i, x))
      .intersperse("\n")
      .through(text.utf8.encode)
      .through(Files[IO].writeAll(Path("chess960.perft")))

  def run: IO[Unit] =
    converter.compile.drain

[niklasf]

Nice. Adding these to shakmaty, too ...