Bucharest, May 11 -- French Grandmaster Maxime Vachier-Lagrave (FIDE rating 2723) defeated reigning World Champion D Gukesh (2787) in the fourth round of the Superbet Classic, registering his first victory over the Indian teenager in Classical format. The two had met twice before in Classical games, with both encounters ending in draws. However, on Saturday, the 2021 World Blitz Champion capitalised on a critical positional error by Gukesh to claim a full point and inflict the 18-year-old's first Classical defeat since becoming World Champion. The decisive moment came on move 22, when Gukesh opted for 22...c5?, a strategic misstep that allowed White to seize the initiative. The more solid continuation 22...Rab8 might have offered Black bett...