Black to play. Hakobyan-Erigaisi, Fide World Rapid Championship, Doha 2025. Erigaisi’s next move decided the game in his favour. What did he play? Email answers to chess@spectator.co.uk by Monday 12 January. There is a prize of a £20 John Lewis voucher for the first correct answer out of a hat. Please include a postal address.

Last week’s solution 1 Rb7! Nxb7 2 h6! g6 3 Qf6 Kf8 4 h7 with mate to follow. Not 1 h6 f6! and Black survives.
Last week’s winner Aaron Milne, Winnington, Cheshire
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