private static bool VerifyBoard(BoardState board)
{
if (board.Material[Color.White] != board.CalculateMaterial(Color.White) ||
board.Material[Color.Black] != board.CalculateMaterial(Color.Black))
{
return(false);
}
if (board.Hash != ZobristHashing.CalculateHash(board))
{
return(false);
}
if (board.PawnHash != ZobristHashing.CalculatePawnHash(board))
{
return(false);
}
if (board.Position[Color.White][GamePhase.Opening] != board.CalculatePosition(Color.White, GamePhase.Opening) ||
board.Position[Color.White][GamePhase.Ending] != board.CalculatePosition(Color.White, GamePhase.Ending) ||
board.Position[Color.Black][GamePhase.Opening] != board.CalculatePosition(Color.Black, GamePhase.Opening) ||
board.Position[Color.Black][GamePhase.Ending] != board.CalculatePosition(Color.Black, GamePhase.Ending))
{
return(false);
}
var pieceTable = new int[64];
board.CalculatePieceTable(pieceTable);
for (var fieldIndex = 0; fieldIndex < 64; fieldIndex++)
{
if (board.PieceTable[fieldIndex] != pieceTable[fieldIndex])
{
return(false);
}
}
return(true);
}
public static BoardState Parse(string fen)
{
var split = fen.Split(' ');
var boardState = split[0];
var colorState = split[1];
var castlingState = split[2];
var enPassantState = split[3];
var halfmoveClock = split.Length > 4 ? int.Parse(split[4]) : 0;
var movesCount = split.Length > 5 ? int.Parse(split[5]) : 0;
var result = new BoardState();
var currentColor = ParseCurrentColor(colorState);
ParseBoardState(boardState, result);
ParseCastlingState(castlingState, result);
ParseEnPassantState(enPassantState, result);
result.Material[Color.White] = result.CalculateMaterial(Color.White);
result.Material[Color.Black] = result.CalculateMaterial(Color.Black);
result.Position[Color.White][GamePhase.Opening] = result.CalculatePosition(Color.White, GamePhase.Opening);
result.Position[Color.White][GamePhase.Ending] = result.CalculatePosition(Color.White, GamePhase.Ending);
result.Position[Color.Black][GamePhase.Opening] = result.CalculatePosition(Color.Black, GamePhase.Opening);
result.Position[Color.Black][GamePhase.Ending] = result.CalculatePosition(Color.Black, GamePhase.Ending);
result.CalculatePieceTable(result.PieceTable);
result.MaterialAtOpening = result.CalculateMaterialAtOpening();
result.MovesCount = movesCount;
result.IrreversibleMovesCount = halfmoveClock;
result.ColorToMove = currentColor;
result.Hash = ZobristHashing.CalculateHash(result);
result.PawnHash = ZobristHashing.CalculatePawnHash(result);
return(result);
}