private ChessDraw[] generateDraws(IChessBoard board, ChessDraw?lastDraw = null)
{
ChessDraw[] draws = new ChessDraw[0];
var drawingSide = lastDraw?.DrawingSide.Opponent() ?? ChessColor.White;
if (board?.GetType() == typeof(ChessBoard))
{
var alliedPieces = board.GetPiecesOfColor(drawingSide);
draws = alliedPieces.SelectMany(x => ChessDrawGenerator.Instance.GetDraws(board, x.Position, lastDraw, true)).ToArray();
}
else if (board?.GetType() == typeof(ChessBitboard))
{
draws = ((ChessBitboard)board).GetAllDraws(drawingSide, lastDraw, true);
}
return(draws);
}