Magnus Carlsen has won the World Chess Championship after a three-week stalemate with challenger Fabiano Caruana.
Carlsen, the reigning champion, won three of four games in which each player had 25 minutes to complete his moves, pumping his fist after the opening one.
Known as the Mozart of Chess, the 27-year-old, from Norway, has been the title since 2013.
This latest victory is his fourth in a row, and he takes a check for € 1m (£ 880,000).
"It was one of those days when it's just flowing," Carlsen told Sky News, "and the game is a lot of fun.
"I did not feel too much pressure today. I knew that if I could show the best version of myself that I was going to win."
The match took place behind soundproof glass on a stage at The College in Holborn, central London.
A detective agency was called to ensure no one cheated, with metal detectors, device sweeping, and advanced surveillance employed to keep the championships clean.
Prior to Wednesday's event, Carlsen and Caruana, 26, from America, had played 12 times each other.
Each match lasted several hours and resulted in a tie.
If the initial series of short final games did not produce a winner, the contenders would have played a series of five-minute challenges.
If those had failed to bring someone out on top, they would have a sudden death "Armageddon" match.
Carlsen is renowned for his skill in quick forms of chess.
Speaking before the match, he said he had "very good chances obviously," adding: "But I do not know what's going to happen."
Thousands of fans followed the showdown online. It was also trending on Twitter.