The game that clinched Magnus Carlsen’s victory in the Gashimov Memorial came, fittingly, in a last-round cliffhanger against his closest rival, Fabiano Caruana. Both players were on 5½ points out of 9 possible, hence a win for either grandmaster would determine the laurels in his favour. A draw, leaving them both tied on 6 points, would have been a reasonable solution, honourable to both sides, but Carlsen is at his most deadly in these tense situations — one of the attributes he has taken from the great psychologist Emanuel Lasker.