No. 662
White to play and mate in two. Composed by Sam Loyd, Sunny South, 1885. Nearly all Black’s legal moves can be met by Qg8 mate, but White must prepare a response against 1…Rg7. What is the key first move? Answers should be emailed to chess@spectator.co.uk by Monday 19 July. There is a prize of £20
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