Probabilistic Tic-Tac-Toe

You can read my writeup here.

Instructions

The rules are the same as normal tic-tac-toe, but each square has a different probability of a good (smiley face), neutral (meh face), or bad (frowny face) event happening when selected.

Good events place your mark (X or O) in the square. Bad events place your opponent's mark. Neutral events do nothing but pass the turn to the opponent.

Click in the top left to choose between 1x, 2x, and 3x speed for animations.

Click in the top right to go to the settings menu. Here you can switch between singleplayer and multiplayer modes, choose the difficulty, and enable tutor mode.

On impossible difficulty, the computer will play mathematically optimally. As such, it will get more wins than you over the course of many (tens to hundreds of) games. You will be able to beat it occasionally, though.

Tutor mode is designed to give an insight into what the impossible AI thinks about each potential move. When hovering over a square in tutor mode, it shows the probability of winning the game given that you a) select that square and b) continue to play optimally for the rest of the game.

Credits

Icons by Font Awesome

Font is Multicolore