Second seed Nihal Sarin heads the four-player Indian brigade, including third seed R. Praggnanadhaa, sixth seed D. Gukesh and eighth seed Leon Mendonca, in the first leg of the $100,000 Julius Baer Challengers Online Chess Tour beginning on Thursday. These players are divided into two teams - Team Kramnik and Team Polgar. Nihal and Gukesh are part of Team Polgar …