Chess puzzle

No. 674

White to play. Mamedyarov–Artemiev, MeltwaterChampions Final 2021. Black’s last move, was Ra8-a4, attacking the pawn on g4. But it allowed Mamedyarov a decisive tactical opportunity. What did he play? Answers should be emailed to chess@spectator.co.uk by Monday 11 October. There is a prize of £20 for the first correct answer out of a hat. Please

No. 673

White to play. This was a variation which could arise in the game R. Pert–M. Parligras, Manx Liberty Masters 2021. Here, White has a surprising way to conclude the game. What is the winning move? Answers should be emailed to chess@spectator.co.uk by Monday 4 October. There is a prize of £20 for the first correct

No. 672

Black to play. J. Polgar — Gaprindashvili, Novi Sad Olympiad 1990. Gaprindashvili’s next move prompted immediate resignation. What did she play? Email answers to chess@spectator.co.uk by 27 September. 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.

No. 671

White to play. Gaprindashvili–Servaty, Dortmund 1974. The dark squares around Black’s king are critically weak, and White found an accurate way to conclude the attack. What was her winning move? Answers should be emailed to chess@spectator.co.uk by Monday 20 September. There is a prize of £20 for the first correct answer out of a hat.

Puzzle no. 670

White to play. Harvey–Roberson, Northumbria Masters 2021. Black’s last move, 37…Kf7-e7 looked plausible, but walked into a clever tactic. What was White’s next move? Answers should be emailed to chess@spectator.co.uk by Monday 13 September. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and

Puzzle no. 669

White to play. Swiercz–Xiong, Sinquefield Cup 2021. 1 Kxb2 allows a perpetual check. But forcing an exchange of queens would allow the f6-pawn to decide the game in White’s favour. Which move did Swiercz play to bring that about? Email answers to chess@spectator.co.uk by Monday 6 September. There is a prize of £20 for the

No. 668

Black to play. Geller–Sveshnikov, USSR Ch 1978. Geller’s last move, 34 Rb1-e1 looked clever, since Black cannot safely capture the queen. But Sveshnikov’s next move exposed a critical flaw in Geller’s idea. What did he play? Answers should be emailed to chess@spectator.co.uk by Monday 30 July. There is a prize of £20 for the first

No. 667

White to play and draw. The conclusion of an endgame study composed by J. Hašek (1951). Black is preparing a queen infiltration via a6. But with the right move, White can ensure that is not fatal. What should White play? Answers should be emailed to chess@spectator.co.uk by Monday 23 August. There is a prize of

No. 666

White to play. Abdusattorov–Durarbayli, Sochi 2021. The endgame looks tricky, but White found a way to force a quick mate. What did he play? Email answers to chess@spectator.co.uk by Monday 16 August. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and allow six

No. 665

White to play. Adhiban–Delgado Ramirez, Sochi 2021. White has more than one good move, but Adhiban found a spectacular way to force mate in four. What did he play?Answers should be emailed to chess@spectator.co.uk by Monday 9 August. There is a prize of £20 for the first correct answer out of a hat. Please include

No. 664

White to play. Greco–NN, 1620. The centre is a dangerous place for the king. Which move does White play to force mate in two moves? Answers should be emailed to chess@spectator.co.uk by Tuesday 3 August. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address.

No. 663

White to play. A variation from Grandelius – Xiong, Fide World Cup, Sochi 2021. With an accurate queen check,White can force an exchange of queens and march the h2-pawn. Which check should White choose? Answers to chess@spectator.co.uk by Monday 26 July. There is a prize of £20 for the first correct answer out of a

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

No. 661

Black to play. Daggupati–Mishra, Charlotte 2020. 1…Rf1+ 2 Kg2 is a dead end, as White’s queen covers the f2 square. Mishra found the only way to draw; his subtle move combined a threat of perpetual check with a stalemate motif. Which move did he play? Answers should be emailed to chess@spectator.co.uk by Monday 12 July.

No. 660

White to play. So–Vachier-Lagrave, Paris, June 2021. The queen on e7 can be taken, but Black’s last move was …Rd8, counterattacking White’s queen. Which move did White play to expose the flaw in this idea? Answers should be emailed to chess@spectator.co.uk by Monday 5 July. There is a prize of £20 for the first correct

No. 659

White to play. Gukesh–Yip, Gelfand Challenge, June 2021. White has strong pressure on the f-file, but which move forces a decisive material gain? Answers should be emailed to chess@spectator.co.uk by Monday 28 June. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and allow

No. 658

Mammadzada — M. Muzychuk, May 2021. In this messy position, Black’s next move prompted instant resignation. What did she play? Answers should be emailed to chess@-spectator.co.uk by Monday 21 June. 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

No. 657

Black to play. Vodopyanov–Kantsyn, 1974. Two bishops up, White appears to have everything covered. Which move allows Black to force a quick win? Answers should be emailed to chess@spectator.co.uk by Monday 14 June. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and allow

No. 656

Black to play. Vocaturo–Gokerkan, May 2021. After a long defence, White’s last move 101 Nf1-e3 was a decisive error. Which move did Black play to wrap up the game? Answers should be emailed to chess@spectator.co.uk by Monday 7 June. There is a prize of £20 for the first correct answer out of a hat. Please

No. 655

White to play, Kharlov–Ernst, Haninge 1992. Black’s last move, g6-g5 was a decisive mistake. Which move did White play to exploit it? Answers should be emailed to chess@spectator.co.uk by Monday 31 May. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and allow six