The 2025 Weissenhaus Freestyle Chess Grand Slam features a unique format randomizes the starting positions of the back-rank pieces, reducing the impact of memorized opening theory. First there will be round robin mini tournament for seeding (where 4 players are eliminated) and then a single elimination bracket will be played in the classical time control (2 classical matches + tiebreaks).

Previous tournament was won by Vincent Keymer.

Event info: https://www.chess.com/events/info/2025-freestyle-chess-grand-slam-paris

• Update 2025-04-05 (PST) (AI summary of creator comment): Player Participation Update:

  • Hans Niemann has been replaced by Nodirbek Abdusattorov

This roster change affects the participants in the tournament and should be taken into account when resolving the market.