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