Place a disc so that a straight line of your opponent's discs is trapped between it and another of your discs: the whole line flips to your colour. When neither side can move, whoever has more discs wins. Play the computer on three levels or a friend on one phone.
👆 Tap a ringed square to place your disc ← All gamesAdded 9 Nov 2026
Play Reversi free in your browser, the classic black-and-white disc flipping board game, against the computer on three levels or with a friend on one phone.
Reversi is played on an 8 by 8 board. It starts with four discs in the middle: two white on d4 and e5, two black on d5 and e4. You play black and always move first; the computer plays white.
On your turn you place one disc of your colour on an empty square. The move is only legal if it traps at least one straight line of your opponent's discs between the new disc and another disc of yours. The line can run across, up and down, or diagonally, and it must have no gaps. Every trapped disc flips over to your colour. One disc can trap several lines at once, and then all of them flip.
The legal squares are marked with a small ring, so you never have to hunt for them. If you have no legal move, you pass and your opponent moves again; the game does this for you. The game ends when neither player can move, usually when the board is full. Whoever has more discs of their colour wins.
Tap a ringed square to play there. Undo takes back your last move and the computer's answer. Hint circles a good square in gold and shows how many discs it flips.
Easy is a computer that looks only one move ahead and often plays a random square, which makes it a good way to learn the rules. Normal looks three moves ahead and knows that corners are valuable and the squares next to them are dangerous. Hard looks five moves ahead and plays the last ten empty squares perfectly. Each level keeps its own games played, wins, streak and medals: bronze for any win, silver and gold for winning by a big margin of discs. In 2 Players mode no stats are saved.
You pass and your opponent moves again. The game does this for you and shows a short message. You can never pass while you still have a legal move, and the game ends only when neither player can move.
Black always moves first. Here you play black against the computer, so the first move is always yours. In 2 Players mode black also starts.
A disc in a corner can never be flipped, because no line can trap it. Discs that grow out from a corner along the edges become safe too. That is why good players avoid the squares right next to an empty corner, which hand the corner to the opponent.
On Easy it only looks one move ahead and often plays a random move. On Normal it looks three moves ahead and knows the value of corners and edges. On Hard it looks five moves ahead and plays the last ten squares of the game perfectly.
Yes. On the start screen switch from vs Computer to 2 Players and pass the phone after each move. Black starts, and the glowing card at the top shows whose turn it is.
Yes. If both players have 32 discs when the board is full, the game is a draw. It is rare, but it happens.
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