White to play and mate in two moves. Composed by Sam Loyd, St Louis Globe-Democrat, 1907. What is White’s first move? Email answers to chess@spectator.co.uk by Monday 3 February. 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…Ng4! wins. If 2 Rxe4 Qb6+! 3 Kh1 Qb1+ leads to mate, as does 2 Qd8+ Kg7 3 Rxe4 Be3+ 4 Rxe3 Qc1+ 5 Bf1 Qxe3+ 6 Kh1 Qf3+ etc. 1 Qxh6+ Nxh6 2 Rxe4 Nf5 wins.
Last week’s winner Arjan Verdi, London SW19
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