Figure 6.2.9.4[White to move]

When you have a knight in the king’s vicinity, make a point of thinking about whether and how it might participate in a mating idea. In this case the important clue to the position again is the knight’s position on f6, diagonal to the Black king; this is a signature position for the Arabian mate, which will be complete if White can get a heavy piece onto either of the squares the knight attacks next to the king: h7 or g8. White has a queen and rook available on adjacent files. How to proceed? Perhaps you can sacrifice one of your heavy pieces in a way that allows the other to reach a mating square. Experiment with both possibilities. 1. RxR, KxR isn’t optimal; it gives the king too much room to run. 1. Qxh7+, however, is direct and effective. It requires Black to play RxQ, and then the path is clear for White to play Rg8#.