Test your chess: Reitstein problem 157

Black to play and win

D Morschel v V Blasl 1977

Solution

Fairly straightforward today- I got this one immediately, since it is a fairly standard motif of back rank mate. In Purdy terms, the Qa3 is tied to defending c1, so 1…Qb4 or 1…Qa5 wins the queen. I prefer 1…Qb4 aesthetically, since 1…Qa5 permits 2 b4, but even then 2…Qa3 and if 3 Ra3 Rc1 mate.

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