public static string AlgebraicMoveString(MGMove mgMove, Position pos)
{
string ret = null;
bool white = pos.MiscInfo.SideToMove == SideType.White;
MGPosition curPosition = MGChessPositionConverter.MGChessPositionFromFEN(pos.FEN);
// Generate moves
MGMoveList moves = new MGMoveList();
MGMoveGen.GenerateMoves(in curPosition, moves);
//if (white) mgMove = new MGMove(mgMove, true);
MGPosition newPosition = MGChessPositionConverter.MGChessPositionFromFEN(pos.FEN);
newPosition.MakeMove(mgMove);
bool isCheck = MGMoveGen.IsInCheck(newPosition, white);
if (mgMove.CastleShort)
{
ret = "O-O";
}
else if (mgMove.CastleLong)
{
ret = "O-O-O";
}
else
{
Square fromSquare = mgMove.FromSquare;
Square toSquare = mgMove.ToSquare;
Piece fromType = pos.PieceOnSquare(fromSquare);
Piece toPiece = pos.PieceOnSquare(toSquare);
if (fromType.Type == PieceType.Pawn)
{
string promoteChar = "";
if (mgMove.PromoteQueen)
{
promoteChar = "Q";
}
if (mgMove.PromoteBishop)
{
promoteChar = "B";
}
if (mgMove.PromoteRook)
{
promoteChar = "R";
}
if (mgMove.PromoteKnight)
{
promoteChar = "N";
}
if (mgMove.EnPassantCapture)
{
int newRank = white ? 6 : 3;
char newFile = char.ToLower(toSquare.FileChar);
ret = fromSquare.ToString().Substring(0, 1).ToLower() + "x" +
newFile + newRank;
}
else if (toPiece.Type == PieceType.None)
{
ret = toSquare.ToString().ToLower() + promoteChar;
}
else
{
ret = fromSquare.ToString().Substring(0, 1).ToLower() + "x" +
toSquare.ToString().ToLower() + promoteChar;
}
}
else
{
string captureChar = toPiece.Type == PieceType.None ? "" : "x";
List <MGMove> matchingCaptures = MovesByPieceTypeThatTakeOnSquare(mgMove.Piece, mgMove.ToSquareIndex, moves);
if (matchingCaptures.Count == 1)
{
ret = char.ToUpper(fromType.Char) + captureChar + toSquare.ToString().ToLower();
}
else
{
// Disambiguate
DifferBy differBy = MoveDifferFromAllOthersBy(matchingCaptures, mgMove);
string fileChar = fromSquare.FileChar.ToString().ToLower();
string rankChar = fromSquare.RankChar.ToString().ToLower();
if (differBy == DifferBy.File)
{
ret = char.ToUpper(fromType.Char) + fileChar + captureChar + toSquare.ToString().ToLower();
}
else if (differBy == DifferBy.Rank)
{
ret = char.ToUpper(fromType.Char) + rankChar + captureChar + toSquare.ToString().ToLower();
}
else
{
ret = char.ToUpper(fromType.Char) + fileChar + rankChar + captureChar + toSquare.ToString().ToLower();
}
}
}
}
if (isCheck)
{
return(ret + "+");
}
else
{
return(ret);
}
}
