Prodigies R. Praggnanandhaa and Arjun Erigaisi won three games on the trot to share the second spot behind Magnus Carlsen in the Julius Baer Generation Cup online chess tournament on Sunday. After four rounds, played on a format that allows three points for a win and one for draw, an unbeaten Carlsen collected 10 points, one more than Praggnanandhaa, Arjun, …