Norway Chess starts on May 26 and ends on June 6. It will be a double round-robin classical tournament (10 rounds/games total) - everyone plays all opponents twice. If the classical game ends in a draw, players contest an armageddon game. Players will get 3 points for win in classical, 1.5 for win in armageddon, 1 for loss in armageddon and 0 points for loss in classical.
Feel free to add any questions you can think of.
Rule clarifications:
Questions are only about Open section of Norway chess unless stated otherwise
Unless stated otherwise "highest"/"most"/"least" etc. includes ties ("Player has the most points at the end")
Options that refer to final rankings (last, first, top 3, ...) include tiebreaks if there are any. But if there are no tiebreaks, then for example "last" will resolve to YES even if 2 players share the last place.
Options that refer to armageddon games include armageddon rules, so if someone draws with black (side with draw odds), it is counted as armageddon win for black side
Market for the winner: https://manifold.markets/Weezing/who-will-win-norway-chess-2025
Update 2025-06-03 (PST) (AI summary of creator comment): - Regarding final ranking ties:
Official tiebreaks will be used for rankings if they exist. The creator's research suggests these tiebreaks are defined only for first place in the Open section of Norway Chess.
For ranks where no official tiebreaks are defined (e.g., for positions other than first place):
If players are tied on points, for example, two players sharing what would be 3rd-4th place:
Both players will count as having finished top 3.
Both players will also count as having finished bottom 3.
This principle of how ties are interpreted for ranking-based options will apply to other similar scenarios.
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Since there is a decent chance some players will be tied in the final rankings, I want to point out rules for options that refer to that. If there are official tiebreaks for rankings we use that, but I only found rules for tiebreaks for the first place and there does not seem to be any tiebreaks for other spots.
If there are no tiebreak rules and for example two players share 3rd-4th place, because they are tied on points, then both will count as if they finished top 3 and also bottom 3. Similarly for other cases.
Note that this is inline with the established rules since the beginning, I just wanted to make it more explicit.