White to play. Keymer-Deac, Grand Chess Tour, Romania, 2026. Keymer found by far the strongest way to prosecute his attack. Which move did he play to force resignation? Email answers to chess@spectator.co.uk by Monday 1 June. There is a prize of a £20 John Lewis voucher 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…Nd3!! threatens Qf6-f3+. After 2 Rxd3 Qc6+ 3 f3 Qc1 White resigned, e.g. 4 Kg2 h1=Q+ 5 Kxh1 Qxf1+ 6 Qg1 Qh3+
Last week’s winner Stephen Davies, Wallington
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