By beating Anish Giri with white, Alireza Firouzja became the sole leader going into the rest day of the Sinquefield Cup. Firouzja has collected 3½ points and stands a half point ahead of Wesley So. The latter escaped with a draw after fiercely defending an endgame material down against R. Praggnanandhaa. Sunday’s sixth round will see So playing white against Firouzja. | Photo: Lennart Ootes

