How to play Otterdoku

The rules

Join one room on separate phones. Everyone gets the same 6×6 puzzle and one starting otter after a shared countdown. Place exactly one otter in each row, column and coloured pool. Otters cannot touch, even diagonally. Choose Otter to place one, or Pebble to mark a cell you have ruled out. Undo and Clear affect only your own pebbles. Rule conflicts cost nothing; a wrong deduction costs one of three hearts. Three mistakes end your attempt. The round lasts up to three minutes, or until everyone finishes. The server checks placements and records finish times; fastest solves rank first, unfinished attempts rank last. Equal times share a place. All slowest or unfinished players take the agreed penalty. Your working marks stay private. Replay starts a new puzzle; no ads, wagers or cash rewards.

What you need and how to start

Create a room, share its code and wait until everyone is ready. One phone each.

In a room, everyone taps Ready, then the host starts. Internet and JavaScript are required.