Queem.Core.BitBoards.BitBoard.UndoMove C# (CSharp) Method

        public virtual void UndoMove(int sqFrom, int sqTo)
        {
            ulong moveFrom = 1UL << sqFrom;
            ulong moveTo = 1UL << sqTo;

            this.board &= (~moveTo);
            this.board |= moveFrom;
        }