Tic Tac Toe

Three in a row wins. Otterfly has played this a few million times in its head. Your move.

You0
your move
draws 0
Otterfly0
thinking

Your move.

Otterfly, standing with wings open

How to play

Get three of your marks in a row: across, down or diagonal. You are X. Otterfly is O.

Classic

The game you know. On Unbeatable, Otterfly plays perfectly, so a draw is the best you can get. We checked every possible game to be sure.

Vanishing

You can only have three marks on the board. When you place a fourth, your oldest one disappears. The mark that goes next flickers, so you can plan for it. We solved all 146,900 positions: whoever moves first can always force a win. Otterfly knows the way. Hint shows it to you too.