Reversi: Black and White

An 8x8 grid fills with black and white discs in Reversi: Black and White. Black faces a computer opponent using white discs, and the side selection can be reversed before the match. Green circles mark legal spaces. A placed disc must line up with another disc of the same color, with opposing discs sitting between them on a straight path.

How to play?

Four discs sit in the middle of the opening, creating four legal first moves for either side. Placing a disc works on horizontal lines or diagonal ones when no empty cell breaks the line between matching colors. Discs trapped between the new piece and your existing color switch sides after the move. Players alternate until all 64 cells are filled. One side takes another move when the opponent has no legal placement. The winner has more discs on the board when the grid is full.