Oslo, May 29 : Round 4 of Norway Chess delivered another exciting day of world-class chess in Oslo, featuring a decisive result in the highly anticipated encounter between World No. 1 Magnus Carlsen and reigning World Champion Gukesh Dommaraju.

Playing with the black pieces, Carlsen gradually outplayed Gukesh in a complex game. The position remained balanced for much of the struggle before the Norwegian star seized his opportunity in the middlegame. Under increasing pressure and time trouble, Gukesh was unable to hold the position, allowing Carlsen to convert his advantage and secure an important classical victory.

The win gives Carlsen valuable points in the tournament standings as he seeks to recover from a slow start on home soil.

The remaining two games in the open tournament ended in draws after hard-fought battles.

Wesley So and Alireza Firouzja played a strategic encounter that neither player was able to break open, with the game eventually concluding peacefully. So later prevailed in the Armageddon game, securing the additional points.

Vincent Keymer and Praggnanandhaa fought a balanced contest that saw chances for both sides but ultimately ended in a draw. Praggnanandhaa went on to win the Armageddon game, earning valuable additional points.

Following round four, Firouzja remains in the tournament lead, while Carlsen's victory significantly strengthens his position in the standings.

The Norway Chess Women tournament featured three closely contested classical games, all of which ended in draws before being decided in Armageddon.

Koneru Humpy and Zhu Jiner drew their game after a tense struggle in which neither player could establish a lasting advantage. Zhu Jiner later won the Armageddon game to collect the additional points.

World Champion Ju Wenjun and Bibisara Assaubayeva also ended their classical encounter in a draw. Assaubayeva enjoyed a slight advantage in several positions, but Ju defended accurately to hold the balance. Assaubayeva later prevailed in the Armageddon game, securing the additional points.

In the third matchup, Divya Deshmukh and Anna Muzychuk battled in a complex struggle. Divya held the advantage through much of the middlegame and pressed for victory, but Muzychuk defended resourcefully and the game ultimately ended in a draw. Muzychuk then won the Armageddon game, securing valuable points.

Following round four, Assaubayeva continues to lead Norway Chess Women, while Anna Muzychuk, Divya Deshmukh and Zhu Jiner remain within striking distance.

/IANS