Chess: Caruana and Nakamura join leaders as Grand Swiss nears finale

3892: White mates in three moves, against any defence (by Fritz Giegold, 1958). Black is down to a single pawn prod, but you’ll do well to spot the hidden solution in 10 minutes. Photograph: The Guardian

It’s tight at the top as the $460,000 Grand Swiss at Douglas, Isle of Man, reaches its final stages this weekend. The closing rounds can be followed, live and free, on the official website with commentary by England’s David Howell and Jovanka Houska. Games begin at 2.45pm on Saturday and 2.15pm on Sunday. Two winners will qualify for the April 2024 Candidates in Toronto, and a possible shot at Ding Liren’s world crown.

Fabiano Caruana and Hikaru Nakamura, the world Nos 2 and 3, are the rating favourites. Both remain unbeaten and the US pair seemed to have timed their finishing spurts well. After drawing in 16 moves in round eight, Nakamura said: “You can try to be the hero sometimes, but if you mess up, especially with the white pieces, you can ruin a tournament in less than 20 minutes.”