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Why Play on Stone Online?
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Real-time Multiplayer
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Practice with AI
Sharpen your skills against AI at 4 difficulty levels
Play vs AI
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About this Game
Play Othello online free — no download, no signup needed. Reversi (Othello) is the classic disc-flipping strategy game on an 8×8 board. One move can swing the entire game — that's why they say 'a minute to learn, a lifetime to master.'
Stone Online gives you four AI difficulty levels to sharpen your strategy. Master corner control and edge tactics against AI, then take on real opponents. Completely free, instant play in your browser.
The modern version was trademarked in 1971 by Japan's Goro Hasegawa, named after Shakespeare's play. Tens of millions play worldwide, with the World Othello Federation hosting international championships.
How to Play
Start with two black and two white discs placed diagonally in the center. Black goes first. Place a disc to sandwich opponent discs horizontally, vertically, or diagonally — they all flip to your color.
Every move must flip at least one disc. No valid move? Pass. The game ends when the board is full or neither player can move. Most discs wins. The key strategy: grab corners — they can't be flipped back. Play the AI and you'll see why!
Game Modes
Frequently Asked Questions
How do I play Reversi online?
Click Play Now, create a room or join an existing one. Once all players are ready, the game starts automatically.
Is Reversi free to play?
Yes, Reversi on Stone Online is completely free. No downloads, no ads, no subscriptions.
How many players can play Reversi?
Reversi supports 2 to 2 players on Stone Online.
Do I need an account to play?
You can play instantly with anonymous login. No email or registration required.
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