ChessCore

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ChessBin.com chess

ChessCore, (ChessBin.com)
a chess engine by Adam Berent, written in C#. The ChessBin.com chess engine was documented in a blog format, and has been converted to cross-platform .NET Core dubbed ChessCore, open source under the MIT License published on GitHub . The program makes heavy use of the .NET Core garbage collector (GC) and is mentioned as buggy in Ron Murawski's engine list .

Evaluate Moves

One sample of ChessCore's extensive GC usage demonstrates its Alpha-Beta search - at each node it generates and sorts all moves (or captures in quiescence) , and allocates the move list and each generated move on the heap : For some reason, internal class position encapsulates the move.

private static List<Position> EvaluateMoves(Board examineBoard, byte depth) {
  ...
  List<Position> positions = new List<Position>();
  for (byte x = 0; x < 64; x++) { ...
    Piece piece = examineBoard.Squares[x].Piece;
    ... continue if empty or opponent piece
    foreach (byte dst in piece.ValidMoves) { ...
      Position move = new Position(x, dst);
      ... Score move, killers, etc ..
      positions.Add(move); 
    }
  }
  return positions;
}

Forum Posts

• New Member Introduction by Adam Berent, CCC, July 19, 2009
• I need help, performance wall! by Adam Berent, CCC, October 21, 2009
• ChessBin 00.59 by Harun Taner, CCC, December 28, 2009

External Links

• GitHub - 3583Bytes/ChessCore: Chess Engine Implemented in .net core
• Chess – Adam Berent
• Computer Chess – Adam Berent
• Computer Chess Information and Resources (Wayback Machine)

References

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