Tic-tac-toe
Play noughts and crosses against an unbeatable minimax computer, a casual random one, or a friend.
How to use
- Choose a mode and difficulty.
- Take turns placing marks.
- Start a new round or reset the score.
What it supports
Two-player or vs-computer on a 3×3 board. The unbeatable mode plays a full minimax tree — it never loses, so expect draws at best. Score counts rounds in this session only.