Test your chess: daily chess puzzle # 152

Black to play and win : white played 1 Na7 in this position. How does black respond?

M O Sullivan v G De Marigny 1981

Solution

1 Na7 opens the a file for black's took, and a Purdy player would note the jump biff Ra8-Ra1: it means the Bb3 might be a LPDO, not being protected by the Pa2.

With these thoughts in mind, 1…Bc5! comes to mind. The main line is then 2 Bc5 Nc5 3 Nb5 Nb3 exploiting the pin 4 Nc7+ K-somewhere (say d7) 5 Na8 Ra8 0-1.

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