public bool GetPiece(int x, int y, ref ChessPiece piece)
{
return(GetPiece((ChessPositionIndex)x + 8 * y, ref piece));
}
public void SetPiece(int x, int y, ChessPiece piece)
{
SetPiece((ChessPositionIndex)x + 8 * y, piece.PieceType, piece.PieceColor);
}