This one is a tough one. I am going to say Qd1? That pins the black queen and forces it to take our Queen. Then, our Rook will take back and have their King in check?
What is white's best move here?
rd1.
Black interposes with the knight, when the knight is taken with a piece other than whites rook it will give a 'free' move so black can get the queen or king out of the skewer.

rd1.
Black interposes with the knight, when the knight is taken with a piece other than whites rook it will give a 'free' move so black can get the queen or king out of the skewer.
Black night is pinned by the bishop and the queen so it can't move. But even if it could move you'd still be down a piece after cxd5
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What is white's best move and why? This position was taken from a game that I played today!