// continue from FEN(Forsyth–Edwards Notation) position
public static ChessGame ContinueFromFEN(string fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1")
{
var parts = fen.Split();
var board = BoardFactory.LoadBoardFromFen(out int turnCounter, fen);
var game = new ChessGame()
{
board = board
};
game.TurnCounter = turnCounter;
return(game);
}
// this parsing is too simplistic to catch all the nuances of proper PGN, but it works for simple examples,
// and it might even get complex examples correct(but it shouldn't relied upon)
public static void parseBody(string body, ChessGame game)
{
body = removeComments(body);
body = body.Replace("\n", " ");
body = body.Replace("\r", " ");
var parts = body.Split(" ");
var moves = game.Moves();
foreach (var part in parts)
{
if (part.Contains("."))
{
continue;
}
var move = moves.Find(move => move.san == part.Trim());
if (move != null)
{
game.Move(move.move);
moves = game.Moves();
}
}
}
public static ChessGame parse(string pgnString)
{
var pgn = new PGN();
var lines = pgnString.Split("\n");
ChessGame game = null;
bool headerSection = true;
var body = "";
foreach (var line in lines)
{
if (line.Trim() == "")
{
if (headerSection == false)
{
return(game);
}
headerSection = false;
game = ChessGame.ContinueFromFEN(pgn.FEN);
game.pgn = pgn;
continue;
}
if (headerSection)
{
parseHeader(line, pgn);
}
else
{
body += line + "\n";
}
}
parseBody(body, game);
return(game);
}
public static String AsciiBoard(ChessGame game, List <Move> moves = null, bool displayCount = false)
{
return(AsciiBoard(game.board, moves, displayCount));
}
public static ChessState GameToState(ChessGame game)
{
var chessState = new ChessState();
//var moves = board.GetMoves().Where(move => board.IsLegalMove(move));
var moves = game.Moves();
for (int column = 0; column < 8; column++)
{
for (int row = 0; row < 8 * BoardStateOffset.ROW_OFFSET; row += BoardStateOffset.ROW_OFFSET)
{
var position = row + column;
Piece piece = game.board.GetPiece(position);
if (piece != Piece.EMPTY)
{
var from = BoardPosition.x88PositionToCoordinate(position);
var chessPiece = new ChessPiece()
{
piece = PieceParser.ToChar(piece).ToString(),
row = from.row,
column = from.column,
isWhite = (piece & Piece.IS_WHITE) == Piece.IS_WHITE
};
chessState.pieces.Add(chessPiece);
foreach (var move in moves)
{
if (move.move.fromPosition == position)
{
var to = BoardPosition.x88PositionToCoordinate(move.move.targetPosition);
chessPiece.options.Add(new PieceOption()
{
row = to.row,
column = to.column,
isPromotion = (Piece)move.move.promotion != Piece.EMPTY,
isCastle = ((MoveFlags)move.move.moveFlags & MoveFlags.CASTLING) == MoveFlags.CASTLING,
isEnpassant = (((MoveFlags)move.move.moveFlags & MoveFlags.ENPASSANT) == MoveFlags.ENPASSANT),
san = move.san
});
}
}
}
}
}
var winner = game.Winner();
if (winner == Winner.DRAW)
{
chessState.isDraw = true;
}
else if (winner == Winner.WINNER_BLACK)
{
chessState.blackWins = true;
}
else if (winner == Winner.WINNER_WHITE)
{
chessState.whiteWins = true;
}
chessState.fen = game.FEN;
return(chessState);
}
