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 firstname.lastname@example.org by Monday 9 August. 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 Nc6+ Nxc6 2 Qe8 mate. Not 1 Bd5 Bd6!