DIAGRAM 26

The only defense at Black's disposal is P-g6, but this move helps
only temporarily. White can force the mate within a few moves in
different ways. One would be the following:

(2) Kt-h6+ K-g7

If the King goes to h8 White mates by Q-f6.

(3) Q-f6+ Kxh6
(4) B-g5+ K-h5
(5) P-h3

and the mate through P-g4 cannot be protected.
Another way would be:

(2) Q-h6 Pxf5
(3) B-f6

and the mate through Q-g7 cannot be protected.

The position of Diagram 26 enables another mating attack for
White, demonstrating the possibility of mating with Bishop and
Knight in the middle of a game, which occurs oftener than one
would be inclined to think. White can play (1) B-f6 instead of Q-
g5 as suggested above. Black cannot take the Bishop as White
would continue Q-h6 with Q-g7 mate. Neither can Black play P-g6
as then White would mate right away with Kt-h6. The latter mate