VS Computer
Easy plays on 6×6; the higher AI presets use 8×8.
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Overview 
Reversi
1-2 players · 5-20 min per session
Place discs to capture (flip) opponent discs in straight lines, and finish with more discs on the board when the game ends.
Board GameStrategyTwo Player
Goal & Core Rules
Place discs to capture (flip) opponent discs in straight lines, and finish with more discs on the board when the game ends.
- Easy uses a 6×6 board; Normal, Hard, Expert, 2-player, and CvC use an 8×8 board.
- A move must flip at least one opponent disc by bracketing it in a straight line.
- If the side to move has no legal move after the previous turn, the turn is passed automatically.
- When neither side can move, the game ends; the player with more discs wins.
2 Players / CvC
The New Game menu also exposes a local 2-player mode and a computer-vs-computer spectator mode.
Controls
Mouse
- Click a legal square to place a disc
- Top-right menu: hub / restart / new game / help
Touch
- Tap a legal square to place a disc
- Top-right menu: hub / restart / new game / help
Beginner Tips
- Early on, don’t chase big flips—fight for good squares.
- Corners are usually game-changing; be careful with squares that hand corners to your opponent.
- Try to limit your opponent’s legal moves (mobility).
Advanced Tips
- Edges and stable discs often decide endgames.
- Keeping your disc count low midgame can be strong if it improves mobility and corner access.
- Practice endgame counting to convert advantages precisely.
Origins & History
Reversi is commonly traced to late-19th-century England (with disputed inventorship). A modern commercial/tournament ruleset became widely known as “Othello” after being promoted in Japan in the 1970s.
Timeline
- 1883 Reversi appears in England (inventor claims are disputed).
- 1971 Othello is associated with a Japanese patent/utility model and commercial push.
Notable People
- Lewis Waterman Claimed inventor of Reversi (disputed)
- John W. Mollett Claimed inventor of Reversi (disputed)
- Goro Hasegawa Helped popularize the modern commercial form as Othello in Japan
FAQ
Why is flipping a lot early sometimes bad?
It can give your opponent access to stronger squares and increase the number of your discs they can target later.
Why are corners so important?
Corner discs are typically unflippable and help secure edges and stable discs.
What happens if I have no legal move?
You pass. If both players pass consecutively, the game ends.