About the game
Play Reversi online
Flank and flip to own the board — outflank your rival's discs to flip them to your colour.
Play Reversi (Othello) online free — vs AI, pass-and-play with a friend, or online. Flank your opponent's discs to flip them and own the most of the 8×8 board.
Play vs AI, pass-and-play with a friend on one screen, or online against a real opponent — free, in your browser, no sign-up.
How to play Reversi
- 1Choose a mode: vs AI (3 levels), pass-and-play with a friend, or online against a real opponent.
- 2Players alternate placing one disc of their colour on an empty square.
- 3Your move must outflank — bracket a straight line of the opponent's discs between your new disc and another of yours.
- 4Every disc you flank flips to your colour — chain long lines for big board swings.
- 5When you have no legal move you pass; when neither player can move, the most discs wins.
Rules
- The board is 8×8, starting with four discs in the centre (two per player, placed diagonally).
- A legal move must flank at least one opponent disc in a straight line — horizontal, vertical, or diagonal.
- All opponent discs caught between your new disc and an existing one flip to your colour.
- If you have no flanking move available, your turn is skipped (auto-pass).
- The game ends when neither player can move; whoever owns more discs wins — an equal split is a draw.