White to play. This is a variation from Mirkovic-Gluzman, Belgrade 1991. Which move allows White to gain a decisive material advantage? Email answers to chess@spectator.co.uk by Monday 29 July. 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…Bd4+ 2 Kxd4 d2 and the pawn can’t be stopped, because the Nd5 is pinned.
Last week’s winner Rodney Beddows, Torquay

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