Donchenko-Liem, Fide World Cup, Goa 2025. Donchenko’s next move forced a decisive material gain. What did he play? Email answers to chess@spectator.co.uk by Monday 24 November. 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 Bf7+!! After 1… Kxf7 2 fxe3 the queen was lost and White won. No better is 1…Qxf7 2 Qxe5+ or 1…Ke7 2 fxe3 Qd6 3 Rad1 etc.
Last week’s winner Tim Nixon, Heptonstall, West Yorkshire
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