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Short notes from the operator of this reversi site: tournament news with links to the official sources, puzzles, rules and strategy notes. New notes appear regularly; every fact links to its source.
- World Othello Championship 2026: Helsinki, 25 to 28 November
20 October 2026 · The 48th World Othello Championship is in Helsinki from 25 to 28 November. Schedule, format, last year's podium and how WOC rules compare with this board.