White to move and win some material.
Give this position some time and let the image sink in your mind. It is not an easy one. White cannot mate black because the king can escape. There is also the knight stopping the open line for Rook. Bishop cannot do much at this position currently either. Anyways here are the moves as white wins the piece and the game after.
Answer
1.Qg7+ Kf8
2.Rxf5+! exf5
3.Qh8+ Ke7
4.Qxg7+ Kd8
5.Qxb7