M m m m

We can find ways to create these mating patterns by studying Alekhin—Mindeno (1935), which is still a classic example.

1 P-N6, which would immediately create the threat of mate on R8, is impossible in view of I . . . QxNP, and if 2 Q-B4ch (with the idea of causing Black to self-block his KB2), then 2 .. . P-Q4 and White goes nowhere. But if there were no pawn on Q3, then the advance of the KNP would decide the game. This circumstance gives rise to a brilliant solution to the problem. 1 N-K5!!

The QP is deflected from the Queen file by a Knight sacrifice. On 1 . . . P-KN3, Black is mated in two moves (2 R-R8ch K-N2 3 R/1-R7 mate), and after I . . . QxN 2 QxQ PxQ 3 P-N6 gives the same result.

1 . . . PxN 2 P-N6, Black resigns (2 . . . QxNP 3 Q-B4ch).

A similar mating pattern can occur in the center, not only at the edge of the board. The simplest example is from the ending of Zaitsev-Mus-limova (1973).

1 QxP! and Black resigned, since the Rook has been diverted from its defense of KB8.

One must not get the impression that the solution is always so elementary. In Bykov-Klaman (1963), White had to find a far from obvious way of continuing the attack.

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