Norway Chess 2025 was the 13th edition of the annual chess tournament held in Stavanger. It was held from 26 May to 6 June 2025. The field of six players featured world number one Magnus Carlsen, world champion Gukesh Dommaraju, Hikaru Nakamura, Arjun Erigaisi, Fabiano Caruana and Wei Yi. It marked the first classical chess encounter between Carlsen and Gukesh since the latter became world champion. Norway Chess Women was also held simultaneously, featuring women's world champion Ju Wenjun. Magnus and Ju were the defending champions.

Magnus successfully defended the title. Anna Muzychuk won the Women section and Ju finished 4th.

Both tournaments were six-player, double round-robin tournaments, meaning there were 10 rounds with each player facing the others twice in classical chess. Like in previous editions, Norway Chess 2025 featured a unique system wherein players played an armageddon game in case the classical game was drawn.

The time control for the classical games was 120 minutes for the entire game, with an increment of 10 seconds starting from move 41. For the armageddon games, white got 10 minutes while black got 7 minutes but had draw odds. Players got 3 points for a classical win, 1½ points for an armageddon win, 1 point for an armageddon loss and 0 points for a classical loss.

In the first round, Carlsen and Gukesh faced off in their first classical game since the Chess World Cup 2023, where Carlsen won 1.5-0.5 in the quarterfinals. After navigating a complex middlegame, Gukesh correctly sacrificed his knight to advance his passed pawn with 42...h3, initiating a pawn race. Both players promoted, and the game remained objectively balanced; however, 46...Qh6+ by Gukesh proved to be the decisive mistake, as Carlsen was able to bring his king to safety before executing his own king hunt.

Nakamura defeated Caruana with the black pieces in the first round, after initially offering his opponent a draw, which was rejected. Caruana later got low on time and blundered in the endgame. In the women's event, Humpy capitalized on an unstoppable checkmate threat after her opponent, Vaishali, "overpressed the position", while Lei and Muzychuk defeated Ju and Khadem respectively in armageddon.

In the second round, Caruana rebounded with a classical win over Wei Yi, while Gukesh suffered a second loss to Arjun in a hard-fought game where Arjun first built up a winning attack, then Gukesh equalized, before Arjun finally prevailed in the bishop versus knight endgame. Carlsen achieved a positional edge in classical against Nakamura, but couldn't convert it, while Nakamura turned the tables in a dramatic armageddon. In the women's event, Muzychuk took the sole lead after defeating Humpy in classical.

Caruana took the sole lead in round 3 with a win over Arjun in a sharp game, while Gukesh, on his 19th birthday, scored his first win of the event against Nakamura. After coming under time pressure in both of his first two games, Gukesh noted that he had managed his time better and got Nakamura into time pressure. Wei defeated Carlsen in armageddon after the latter once again failed to convert an edge in classical game. Humpy bounced back with a win over Khadem in the women's event to move into the shared lead with Muzychuk.