Black to play. This position is a variation from Troff-Nakamura, US Championship 2015. How can Black conclude his kingside attack with a standard tactic? Answers to me at The Spectator by Tuesday 28 April or via email to victoria@spectator.co.uk or by fax on 020 7681 3773. The winner will be the first correct answer out of a hat, and each week I am offering a prize of £20. Please include a postal address and allow six weeks for prize delivery.

Last week’s solution 1 Qxf7+

Last week’s winner Sergio Petro, Croydon, Surrey