No. 713

White to play and mate in two. Composed by Henri Rinck, La Strategie, 1892. Answers should be emailed to chess@spectator.co.uk by Monday 2 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 Rc2! If 1…Kd5 2 Bf3# or 1…Kd3 2 Nf2# or 1…Kf4 2 Rc4#

Last week’s winner Iain Chadwick, Edinburgh