This week’s puzzle is the opening round of a national contest where Guardian readers traditionally perform strongly and in considerable numbers.
You have to work out how White, playing as usual up the board, can force checkmate in two moves, however Black defends. The puzzle is the first stage of the annual Winton British Solving Championship.
organised by the British Chess Problem Society. The competition is open only to British residents, and entry is free. Its prize fund is expected to be around £2,500, including awards to juniors.
To take part, simply send White’s first move to Nigel Dennis, Boundary House, 230 Greys Road, Henley-on-Thames, Oxon RG9 1QY.
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