Magnus Carlsen has revealed the reason why he loves the freestyle chess format. Carlsen was speaking on the sidelines of the 2025 Freestyle Chess Grand Slam, which he co-founded with Jan Henric Buettner in March 2024.

Niemann has been involved in a public feud with Carlsen since the five-time world champion accused his American opponent of cheating in the Sinquefield Cup in 2022.

Carlsen, the world’s highest-rated chess player since 2010, will take a seat in Weissenhaus, Germany, to compete in freestyle chess, previously known as Chess960 and Fischer Random. The starting position of the back row pieces is randomized, removing a top grandmaster’s lifetime of memorization and theory on how to open a chess game.

This isn't just another chess tournament though, with a public spat between Carlsen and the promoters of the FCGT with FIDE in the build-up to the tournament.