ChessDotNet.ChessGame.WouldBeInCheckAfter C# (CSharp) Method

        public virtual bool WouldBeInCheckAfter(Move move, Player player)
        {
            ChessUtilities.ThrowIfNull(move, "move");
            GameCreationData gcd = new GameCreationData();
            gcd.Board = Board;
            gcd.CanWhiteCastleKingSide = CanWhiteCastleKingSide;
            gcd.CanWhiteCastleQueenSide = CanWhiteCastleQueenSide;
            gcd.CanBlackCastleKingSide = CanBlackCastleKingSide;
            gcd.CanBlackCastleQueenSide = CanBlackCastleQueenSide;
            gcd.EnPassant = null;
            if (_moves.Count > 0)
            {
                DetailedMove last = _moves.Last();
                if (last.Piece is Pawn && new PositionDistance(last.OriginalPosition, last.NewPosition).DistanceY == 2)
                {
                    gcd.EnPassant = new Position(last.NewPosition.File, last.Player == Player.White ? 3 : 6);
                }
            }
            gcd.HalfMoveClock = _halfMoveClock;
            gcd.FullMoveNumber = _fullMoveNumber;
            ChessGame copy = new ChessGame(gcd);
            copy.ApplyMove(move, true);
            return copy.IsInCheck(player);
        }