Reversi

A disk-flipping strategy game played on several board sizes.

Reversi is a two-player strategy game played with black and white disks. Black moves first.

Rules

The game starts with four disks in the center of the board: two black and two white on opposite diagonals.

On each turn, a player places one disk of their color on an empty square. The move must outflank at least one straight line of opponent disks. A line is outflanked when the newly placed disk and another disk of the moving color enclose one or more opponent disks horizontally, vertically, or diagonally.

All outflanked opponent disks are flipped to the moving player’s color.

If a player has no legal move, they pass. Passing is only legal when no move is available. The game ends when neither player has a legal move.

The player with more disks on the board wins. If both players have the same number of disks, the game is a draw.

Variants on Little Golem

Variant Board
Size 6x6 6x6
Size 8x8 8x8
Size 10x10 10x10
Size 12x12 12x12

Last modified July 8, 2026: document basic game rules (6d4cf57)