with Knight and Bishop White can force, even if Black does not
move the Pawn g7 but makes some other indifferent move, as for
instance Qxc2. White would then make the surprising move Q-h6,
allowing Black to take the Queen. In doing so, however, Black
again enables the mate Kt-h6.

The only move which Black could try in answer to (1) B-f6 is P-
h6, preventing the Queen from occupying g5. Now Qxh6 would not be
feasible as after Pxh6 White does not mate with Ktxh6, but leaves
the square h7 open to Black's King.


+---------------------------------------+
8 | #R | | #B | #Q | | #R | | #K |
|---------------------------------------|
7 | #P | #P | #P | #P | ^Kt| #P | #P | #P |
|---------------------------------------|
6 | | | | | | | | |
|---------------------------------------|
5 | | #Kt| | | ^R | | | |
|---------------------------------------|
4 | | | | | | | | |
|---------------------------------------|
3 | | | | | | | | |
|---------------------------------------|
2 | ^P | ^P | ^P | ^P | | ^P | ^P | ^P |
|---------------------------------------|
1 | ^R | | ^B | ^Q | | | ^K | |
+---------------------------------------+
a b c d e f g h