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

DIAGRAM 41.

The main threat of Black's third move is R-e6-g6 mate. Another
threat is P-d2 followed by R-e1+. The only way for White to
defend himself is (4) P-f4. If now P-d2, then (5) P-f3, R-e1+;
(6) K-f2 affords a sufficient protection. And if (4) ..., Re8-e6,
then (5) P-f5 prevents the Rook from going to g6.

However, by repeating the mating threat with (5) ..., Re6-e4,
which forces White to protect, g4 by (6) P-f3 Black opens the
second rank for a combined assault of the Rooks similar to the
one illustrated by Diagram 30. What makes matters worse for White
is that with (6) ..., R-g2+ he is forced into the line of the
Bishop h3 so that he is exposed to a discovered check. After (7)