no. 515
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Black to play. This is from Carlsen-Polgar, Mexico 2012. Judit had been struggling in this game but when Carlsen slipped up she was quick to spot the opportunity. Black’s next destroyed the white position. What was it? Answers to me at The Spectator by Tuesday 24 July or via email to There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and allow six weeks for prize delivery.

Last week’s solution 1 … Rc7

Last week’s winner Markus Kobler, Sevenoaks, Kent