No. 612
White to play. Giri–Nepomniachtchi, Chessable Masters 2020. Giri has sacrificed a knight to lure the black king forward. Which move forced a decisive breakthrough? Answers should be emailed to chess@spectator.co.uk by Monday 13 July. There is a prize of £20 for the first correct answer out of a hat. Please include a postal address and
