private static string ConvertCurrentGameStateToFEN(Board currentBoard, GameConditions currentGameConditions)
{
string toMoveString = currentGameConditions.WhiteToMove ? "w" : "b";
bool areAnyCastlingsAvailable = currentGameConditions.WhiteCanCastleKingside || currentGameConditions.WhiteCanCastleQueenside || currentGameConditions.BlackCanCastleKingside || currentGameConditions.BlackCanCastleQueenside;
string castlingInfoString = areAnyCastlingsAvailable ?
$"{(currentGameConditions.WhiteCanCastleKingside ? "K" : "")}{(currentGameConditions.WhiteCanCastleQueenside ? "Q" : "")}{(currentGameConditions.BlackCanCastleKingside ? "k" : "")}{(currentGameConditions.BlackCanCastleQueenside ? "q" : "")}" :
"-";
string enPassantSquareString = currentGameConditions.EnPassantSquare.IsValid ?
SquareUtil.SquareToString(currentGameConditions.EnPassantSquare) :
"-";
return($"{CalculateRankStrings(currentBoard)} {toMoveString} {castlingInfoString} {enPassantSquareString} {currentGameConditions.HalfMoveClock} {currentGameConditions.TurnNumber}");
}
// TODO handle ambiguous piece moves.
public string ToAlgebraicNotation()
{
string moveText = "";
string pieceSymbol = Piece is Pawn ?
CapturedPiece ? SquareUtil.FileIntToCharMap[Move.Start.File] : "" :
pieceTypeToANSymbolMap[Piece.GetType()];
string captureText = CapturedPiece ? "x" : "";
string endSquareString = SquareUtil.SquareToString(Move.End);
string suffix = CausedCheckmate ? "#" :
CausedCheck ? "+" : "";
switch (Piece)
{
case King _:
if (Move is CastlingMove)
{
moveText += Move.End.File == 3 ? $"O-O-O{suffix}" : $"O-O{suffix}";
}
else
{
moveText += $"{pieceSymbol}{captureText}{endSquareString}{suffix}";
}
break;
case Pawn _:
string pawnPromotionPieceSymbol = Move is PromotionMove promotionMove ? pieceTypeToANSymbolMap[promotionMove.AssociatedPiece.GetType()] : "";
moveText += $"{pieceSymbol}{captureText}{endSquareString}{pawnPromotionPieceSymbol}{suffix}";
break;
case Knight _:
case Bishop _:
case Rook _:
case Queen _:
moveText += $"{pieceSymbol}{captureText}{endSquareString}{suffix}";
break;
}
return(moveText);
}