public bool MovePiece(Point from, Point to)
{
if (board.IsEmpty(from))
{
return(false);
}
if (king.IsEnemy(board[from]))
{
return(false);
}
Piece piece = board.PopPiece(from);
if (IsCheck())
{
board.AddPiece(piece);
return(false);
}
return(board.MovePiece(from, to));
}