Reversi (黑白棋)

How to Play

Reversi (Othello) is played on an 8×8 board starting with four central discs. Black moves first. A legal move places a disc so that it flanks one or more straight lines of the opponent's discs between the new disc and another of your own — all flanked discs flip to your color. You must move if you have a legal move; if not, you pass. When neither player can move (usually when the board is full), the player with more discs wins.

Controls

Legal moves are marked with a dot — tap one to place your disc and flip the flanked discs. In vs-AI mode you play Black; in hotseat mode two players alternate on one device. Use Restart to play again or Back to change mode.

Tips & Strategy

Corners can never be flipped — grab them and avoid the squares next to empty corners that hand them over. Early on, fewer discs is often better (more mobility); don't rush to flip everything. Limit your opponent's options to force bad moves.