Figure 2.1.7.8[White to move]

White’s knight is on a dark square. Both of Black’s rooks and his bishop likewise are on dark squares and are positioned for a fork at d7. Black’s queen guards the square but can be eliminated with the simple capture 1. QxQ. Consider Black’s possible replies to that move. RxQ is out because the rook is pinned. It will have to be 1. …KxQ or 1 …BxQ, either of which leaves d7 available for White’s knight. Yet this is no good because then Nd7 is met by Black with RxR! Again, when you are forking pieces and none of them are a king, you need to ask what damage any of them might be able to do while breaking out of the fork. And anyway you should not be settling for a fork of a bishop and rook when the king is so close to being on a forking square as well. So after the exchange of queens White plays 2. RxR+, KxR―then Nd7+, winning a rook with the sequence.