Bengaluru, July 22 -- For the second day in a row, chess World Champion D Gukesh, 20, squandered a winning position, going down to 19-year-old M Pranesh in Round 6 of the Chennai Grand Masters on Tuesday. The defeat leaves Gukesh in a worrying position ahead of his world title defence against Javokhir Sindarov in November. For the second consecutive classical tournament, after Norway Chess, he is rooted to the bottom of the standings. The loss also saw his live Elo rating - an unofficial real-time rating that updates after every game before the official monthly FIDE list is published - slip to 2702. If he loses to Hans Niemann, who is one place above him in the tournament's standings, in Wednesday's final round, Gukesh will drop below the 2...