Chess puzzle

No. 853

White to play and mate in two moves. Composed by Joseph Cowley, The Chess Bouquet, 1897. Email answers to chess@spectator.co.uk by Monday 9 May. 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.

No. 852

White to play. Torre-Parker, New York Simultaneous exhibition, 1916. White resigned, seeing no defence to the threat of Rc5-c1+. Which move would have led to the opposite result? Email answers to chess@spectator.co.uk by Monday 2 June. There is a prize of a £20 John Lewis voucher for the first correct answer out of a hat.

No. 851

Black to play. Donchenko-Blübaum, German Championship Masters 2025. White threatens mate on the queenside. Which move allowed Blübaum to strike first on the kingside? Email answers to chess@spectator.co.uk by Monday 26 May. There is a prize of a £20 John Lewis voucher for the first correct answer out of a hat. Please include a postal

No. 850

White to play and draw. The conclusion of an endgame study composed by Frédéric Lazard in 1946. Which move allows White to salvage a draw from this position? Email answers to chess@spectator.co.uk by Monday 19 May. There is a prize of a £20 John Lewis voucher for the first correct answer out of a hat.

No. 849

White to play. F. Olafsson – Tal, Alekhine Memorial, Moscow 1971. Tal’s last move, attacking the queen, was a huge mistake. How did Olafsson win the game? Email answers to chess@spectator.co.uk by Monday 12 May. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address

No. 848

White to play. Dardha-Sorensen, Grenke Freestyle Open, 2025. The knight forks rook and bishop, and Re6-e3 runs into another fork with Nd4-c2+. Which move enabled Dardha to decide the game in his favour? Email answers to chess@spectator.co.uk by Monday 5 May. There is a prize of a £20 John Lewis voucher for the first correct

No. 847

Black to play. Wikar-Rida, European Women’s Championship, 2025. Three pawns down, 13-year-old Rida had done well to create counter-chances, and here she spotted her opportunity. Which move won her the game? Email answers to chess@spectator.co.uk by Monday 28 April. There is a prize of a £20 John Lewis voucher for the first correct answer out

No. 846

White to play and mate in two moves. Composed by Sam Loyd, Detroit Free Press, 1877. Email answers to chess@spectator.co.uk by Monday 22 April. There is a prize of £20 for the first correct answer out of a hat. Please include a postal addressand allow six weeks for prize delivery. Last week’s solution 1 Rb3!

No. 845

White to play. Bjerre-Bodrogi, European Individual Championship, 2025. The game was eventually drawn, but in this position Bjerre missed a beautiful winning move. What was it? Email answers to chess@spectator.co.uk by Monday 14 April. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and

No. 844

White to play. Eren-Bosiocic, European Individual Championship, 2025. Here, White conjured a mating attack from his tangle of pieces on the kingside. Which move did he play? Email answers to chess@spectator.co.uk by Monday 7 April. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address

No. 843

White to play and mate in two moves. Composed by William Shinkman, The Good Companion, 1919. Email answers to chess@spectator.co.uk by Monday 31 March. 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.

No. 842

Black to play. Verbytski – Sarakauskas, British Rapidplay Championship, 2025. 1…Re1+ 2 Kf2 is wildly complex, while Sarakauskas tried 1…Qb1+ and lost. But he missed a move which wins on the spot. What was it? Email answers to chess@spectator.co.uk by Monday 24 March. There is a prize of a £20 John Lewis voucher for the

No. 841

White to play and mate in two moves. Composed by George Edward Carpenter, Dubuque Chess Journal, 1873. Email answers to chess@spectator.co.uk by Monday 17 March. 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

No. 840

White to play. Spassky-Marsalek, World U26 Team Championship, Leningrad 1960. After Spassky’s next move, his opponent resigned. What did he play? Email answers to chess@spectator.co.uk by Monday 10 March. 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

No. 839

White to play and mate in two moves. The original problem was a mate in three, composed by Godfrey Heathcote for British Chess Magazine in 1904. In this, the most beautiful variation, White has just two moves left to give mate. What is the first move? Email answers to chess@spectator.co.uk by Monday 3 March. There

No. 838

White to play. A variation from Keymer-Carlsen, Freestyle Chess Grand Slam Tour, Weissenhaus 2025. Which move allows White to conclude the attack? Email answers to chess@spectator.co.uk by Monday 24 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 and

No. 837

White to play. Gukesh-Praggnanandhaa, Tata Steel Masters tiebreak, 2025. Black’s last move, 35…Qd3-d6 was a blunder. Which move did Gukesh play to exploit it? Email answers to chess@spectator.co.uk by Monday 17 February. There is a prize of a £20 John Lewis voucher for the first correct answer out of a hat. Please include a postal

No. 836

Black to play. Gurel-Nguyen, Tata Steel Challengers, 2025. Black’s king is in danger here. Which move allowed him to save the game? Email answers to chess@spectator.co.uk by Monday 10 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

No. 835

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

No. 834

Black to play. Gukesh-Giri, Wijk aan Zee, 2025. With less than a minute, Giri erred and lost here. Which move would have won him the game? Email answers to chess@spectator.co.uk by Monday 27 January. There is a prize of a £20 John Lewis voucher for the first correct answer out of a hat. Please include