Team India B, four debutants still in their teens, created the biggest and most sensational upset of the 44th Chess Olympiad today by routing the top seed and star-studded USA Team 3-1. The sensation of the day – and of the entire Olympiad so far – was the performance of Dommaraju Gukesh. The sixteen-year-old had won all of his first seven games, and now faced former World Championship Challenger Fabiano Caruana, with the black pieces. So what did the lad do: he outplayed and actually mated his illustrious opponent! You can watch it all unfold in an exciting video report | Photo Stev Bonhage