public Board Move(FigureMoving fm)
{
Board next = new Board(fen);
next.SetFigureAt(fm.from, Figure.none);
next.SetFigureAt(fm.to, fm.promotion == Figure.none ? fm.figure : fm.promotion);
if (moveColor == Color.black)
{
next.moveNumber++;
}
next.moveColor = moveColor.FlipColor();
next.GenerateFEN();
return(next);
}