Reversi

8×8 board, 4 centre discs to start. Place a disc so it traps one or more straight lines of opponent discs between your discs; they flip to your colour.

8×8 board flip rules 3 AI levels

Pick a mode

Engine difficulty

Press New game to start

Modevs AI · medium

Turn—

Time0:00

Statusidle

Click any valid empty square (highlighted on hover) to place your disc. Valid = it traps at least one straight line of enemy discs between two of your discs. Trapped discs flip to your colour.