public override string ToString()
{
var move = Lookups.MapSquareToRankFile(PieceToMove.Square) + Lookups.MapSquareToRankFile(ToSquare);
if (PromotedTo.Type != PieceType.Empty)
{
move += PromotedTo.ToString();
}
return(move);
}
public Piece[] ParseRankAndFile()
{
var squares = CreateBoard();
const int rankSections = 8;
int rank = 7;
for (int rankSectionNdx = 0; rankSectionNdx < rankSections; rankSectionNdx++)
{
int file = 0;
var section = _sections[rankSectionNdx];
foreach (char pieceIdentifier in section)
{
var countOfPieces = 1;
Piece piece;
int boardNdx = Lookups.FileRankToSquare(file, rank);
if (pieceIdentifier >= '1' && pieceIdentifier <= '8')
{
int.TryParse(pieceIdentifier.ToString(CultureInfo.CurrentCulture), out countOfPieces);
piece = new EmptyPiece {
Square = boardNdx
};
}
else
{
piece = Lookups.FenPieceLookup[pieceIdentifier]();
piece.Square = boardNdx;
}
squares[boardNdx] = piece;
file++;
for (var count = 1; count < countOfPieces; count++)
{
boardNdx = Lookups.FileRankToSquare(file, rank);
squares[boardNdx] = new EmptyPiece {
Square = boardNdx
};
file++;
}
}
rank--;
if (file > 8)
{
throw new Exception("FEN has found a file larger than eight");
}
}
return(squares);
}
private Piece[] CreateBoard()
{
var squares = new Piece[120];
for (int i = 0; i < squares.Length; i++)
{
squares[i] = new OffBoardPiece();
}
for (int i = 0; i < 64; i++)
{
squares[Lookups.Map64To120(i)] = new EmptyPiece();
}
return(squares);
}
public int ParseEnPassantSection()
{
string section = _sections[EnPassantSection];
if (section == "-")
{
return(0);
}
if (section.Length != 2)
{
throw new Exception("EnPassant section must be two characters in length");
}
int file = section[0] - 'a';
int rank = section[1] - '1';
return(Lookups.FileRankToSquare(file, rank));
}