Fabiano Caruana took the sole lead at the Sinquefield Cup after defeating Nodirbek Abdusattorov in round four, his second straight win. The Uzbek player’s aggressive strategy with opposite-side castling and a speculative knight sacrifice backfired, leaving him with a third loss in four games. Maxime Vachier-Lagrave again missed a clear winning chance, this time against world champion Gukesh Dommaraju, while Alireza Firouzja’s sharp encounter with Wesley So also ended in a draw. | Photo: Lennart Ootes

