How it works
Reversi is played on an 8-by-8 board. The game starts with four discs in the center, and Black moves first.
On your turn, place a disc on an empty square that traps at least one opposing disc in a straight line. The line can run horizontally, vertically, or diagonally. Any trapped discs flip to your color.
- A legal move must flip at least one opposing disc.
- Empty squares break a line. You only flip an unbroken line of opponent discs.
- A single move can flip discs in more than one direction.
- You cannot pass if you have a legal move.
- If you have no legal move, the app passes automatically.
- The game ends when the board is full or neither player can move.
- Whoever has more discs on the board at the end wins.
The game highlights legal squares so you know where a disc can be placed. It does not rank the moves or tell you which one is best.