Black to play. Sukandar-Niemann, Reykjavik Open 2022. In this preposterous position, Black found a quick forced mate. What did he play? Answers should be emailed to chess@spectator.co.ukby Monday 25 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 Rg1! leaves Black no good response to 2 Rg8+ Rxg8 3 Nf7#

Last week’s winner Luís Asúa, Madrid