Standard Reversi (Othello) rules:

1. At the beginning of the game, 2 black and 2 white pieces are placed in the center of the board.

2. Black plays first, then black and white players take turn.

3. As long as the placed piece and any one of your own pieces on the board are on the same line (horizontal, straight, or diagonal), you can turn the opponent's pieces into your own.

4. If you can't clamp any of the opponent's pawns in any position, let the opponent play.

5. When neither players can play, the game ends, and the player with more pieces wins.