Black to play. This is a position from Carbone–Slipak, Mar del Plata 2016. How can Black conclude? Answers to me at The Spectator by Tuesday 19 April or via email to victoria@spectator.co.uk or by fax on 020 7681 3773. 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 Rxg6

Last week’s winner Malcolm Burn, Tuffley, Gloucester