1 | | | | | | | | |
+---------------------------------------+
a b c d e f g h

DIAGRAM 28.

White plays (1) Q-h5, and if Black makes an indifferent move he
mates through (2) Qxh7+, Kxh7; (3) R-h5.

Black could try to defend himself with (1) ..., P-g6. White can
then continue with (2) Q-h6 and again Black cannot make an
indifferent move such as P-d6 for instance, as White would have
another mate in two moves, namely (3) R-h5 (threatening Qxh7),
Pxh5; (4) Q-f6.

More frequent than the mate with Rook and Knight shown above is
one which usually occurs in the end game and which is illustrated
in Diagram 28.

+---------------------------------------+
8 | | | #R | | #R | | #K | |
|---------------------------------------|
7 | #P | | | | | #P | | |
|---------------------------------------|
6 | | #P | | | #P | | #P | |
|---------------------------------------|
5 | #Q | | | #P | | | | |
|---------------------------------------|
4 | | #Kt| | | | ^P | | ^B |
|---------------------------------------|