Figure 6.2.5.9[White to move]

Lolli also was responsible for this position from 1763, which is solved using the idea from Damiano—the queue. Take stock of White’s mating resources: the bishop on f6; the queen on d2, which can jump to h2 or h6; and the two rooks on the first rank, likewise able to get to the h-file quickly. The natural way to begin is 1. Qh6, as this creates the triangulation associated with Lolli and his mates. Black is required to play Qf8, bringing in a reinforcement for g7. This is important to notice; when you imagine a mating attack on squares around the king, ask whether your opponent can rush any defenders to positions where they can protect the weak points. But since he has heavy pieces ready to use on the h-file, White simply forgets about using g7 as a mating square and instead sacrifices his queen with 2. Qxh7+ to open the file. Black has to respond KxQ. Now of course comes 3. Rh1+. If Black retreats his king to g8 he gets mated next move by Rh8, so he again interposes his queen, this time with 3. …Qh6. White answers 4. RxQ+, less for the sake of taking the queen than to thoroughly expose Black’s king. Again Black is forced to recapture KxR. That leaves White to play his last rook over to h1, where it mates.

The position shows the great power a bishop can exert on f6. See how it attacks e7, g7, and g5, effectively sealing Black’s king onto the back rank and the h-file. Rh1# for White thus works almost like a back rank mate turned on its side.