Chess puzzle

No. 654

White to play. Cochrane–Bonnerjee, 1852. Out of eight discovered checks with the knight on e6, Cochrane found the only one which wins the game. Which move did he choose? Answers should be emailed to chess@spectator.co.uk by Monday 24 May. There is a prize of £20 for the first correct answer out of a hat. Please

No. 653

White to play, Jones–Dominguez, New in Chess Classic, April 2021. Gawain Jones was hoping that his rook and pawn would cordon off Black’s king indefinitely. But here, at move 125, a surprising opportunity arose. What move should White have played? Email answers to chess@spectator.co.uk by Monday 17 May. There is a prize of £20 for

No. 652

White to play and mate in two moves. Composed by Revd Ernest Clement Mortimer, The Problemist, 1942. Answers should be emailed to chess@spectator.co.uk by Monday 10 May. 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

No. 651

White to play and mate in two moves. Composed by Henry William Butler. Answers should be emailed to chess@spectator.co.uk by Monday 3 May. 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…Ng6! traps

No. 650

Black to play. Praggnanandhaa–Salimova, April 2021. White’s last move, Bg2-f3, was a blunder. Which move should Black play to exploit it? Email answers to chess@spectator.co.uk by Monday 26 April. 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

No. 649

White to play. Van Wely–Shimanov, March 2021. White has several tempting options here, but one move is much stronger than the rest. Which one? Answers should be emailed to chess@spectator.co.uk by Monday 19 April. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and

No. 648

Black to play. Livaic-–Oparin, Fide World University Online Championship, March 2021. After 1…Rxc5 2 Rxb4, a draw was soon agreed. Which move should Black have preferred? Answers should be emailed to chess@spectator.co.uk by Monday 12 April. There is a prize of £20 for the first correct answer out of a hat. Please include a postal

No. 647

White to play and mate in two moves. Composed by B.P. Barnes, Skakbladet 1961. Answers should be emailed to chess@spectator.co.uk by Monday 5 April. 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…Qf5?

No. 646

Black to play… and lose! Aronian–Van Foreest, March 2021. Van Foreest’s next move didn’t blunder his queen but was nonetheless a fatal error. Can you see what he played? Answers should be emailed to chess@spectator.co.uk by Monday 29 March. There is a prize of £20 for the first correct answer out of a hat. Please

No. 645

Black to play. Kosteniuk–Koneru, Skolkovo Grand Prix, 2019. The obvious 1…Kg3 fails to 2 Rg5+ Kf4 3 Rg4+. Losing the pawn looks inevitable, but Koneru found the only move to save herself. What did she play? Answers should be emailed to chess@spectator.co.uk by 22 March. There is a prize of £20 for the first correct

No. 644

White to play and mate in two moves. Composed by Philip Hamilton Williams, Birmingham Post, 1890. Answers should be emailed to chess@-spectator.co.uk by Monday 15 March. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address. Last week’s solution : 1 Qd5! Nc5+ 2 Ka2

No. 643

White to play. Garcia Ramos–Maurizzi, -Barcelona 2021. Black has just played Kg8-h7, to attack White’s queen by unpinning the knight on e6. Choose between 1 Qd5, 1 Qe3 and 1 Bxe6. Which do you prefer? Answers should be emailed to chess@spectator.co.uk by Monday 8 March. There is a prize of £20 for the first correct

No. 642

Black to play. Warakomski-–Korobov, February 2021. White has a pin on the b-file and 1…Bxg2+ 2 Kxg2 Bc5 3 Rb7 should suffice for a draw, despite the pawn deficit. But Korobov’s next move provoked instant resignation. What did he play? Answers to chess@spectator.co.uk by Monday 1 March, for a prize of £20 for the first

No. 641

White to play. Carlsen–Vachier-Lagrave, Opera Euro Rapid 2020. Carlsen played 31 Bd4+ Rxd4 32 cxd4 Bxd4 which should be drawn, though he won in the end. Can you find the much s-tronger move which he missed? Answers to be emailed to chess@spectator.co.uk by Monday 22 February. There is a prize of £20 for the first

No. 640

White to play and mate in two moves. Composed by Theodore Herlin, Schachzeitung 1852. Answers to be emailed to chess@spectator.co.uk by Monday 15 February. 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

No. 639

White to play. Giri-Wojtaszek, Wijk aan Zee 2021. On his last move, Black waited with 48… Ba1-b2, yielding White a decisive opportunity. Which move enabled Giri to break through? Answers should be emailed to chess@spectator.co.uk by Monday 8 February. There is a prize of £20 for the first correct answer out of a hat. Please

No. 638

Kokkoris–Kavalek, Athens 1968. Kavalek’s next move initiated a beautiful forced mating sequence. What did he play? Answers should be emailed to chess@spectator.co.uk by Monday 1 February. 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

No. 637

White to play. Howell — Adams, Caplin Hastings Online 2021. Adams’s last move, 35…Ba4-b3, gave Howell the chance for a tactical strike, gaining a decisive advantage. What was his next move? Answers should be emailed to chess@spectator.co.uk by Monday 25 January. There is a prize of £20 for the first correct answer out of a

No. 636

Gormally–Turner, Caplin Hastings Online 2021. Black looks safe, but Gormally’s next move forced a win of material. What did he play? Email answers to chess@spectator.co.uk by Monday 18 January. 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

No. 635

Mastrovasilis–Marechal, Cappelle la Grande 2011. Black is a whole rook up, so his last move 34… Nd5-e7, angling for an exchange of knights, looks plausible. Which move did White play to expose a hidden flaw? Answers should be emailed to chess@spectator.co.uk by Monday 11 January. There is a prize of £20 for the first correct