White to play. A nice example from the ‘Generating Chess Puzzles’ paper mentioned above. Which move allows White to force checkmate on the kingside? Email answers to chess@spectator.co.uk by Monday 1 December. 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 Qg7+! Rxg7 2 fxg7+ Kg8 3 Nf6+ Kxg7 4 Nxd5 and White won
Last week’s winner Stuart Bahn, Teddington
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