Two large gouache cats on a lamplit kitchen table.

place · sandwich · roll over

How to play Reversi.

Bracket and flip discs on an 8×8 table. Take the corners, control the board and finish with the most discs. It is for two players, with bots to fill empty seats and is free in your browser: no download, no account.

How the cats turn

  1. Put a cat down on a tile marked +N. N is how many cats that move turns over.
  2. A move must catch a straight line of the other side’s cats between your new cat and one already yours: across, down or diagonal.
  3. Every caught cat changes to your side (back up or belly up). Several lines can change at once.
  4. No +N for you? Your turn passes by itself.
  5. When nobody can move, whoever has more cats showing their side wins. Black backs go first.
Backs
Backs
Bellies
Bellies

Keyboard: arrow keys walk the board, Enter or Space plays the square.

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