Tic-tac-toe

You win! X takes it.

 O |   | O 
---+---+---
   | O | X 
---+---+---
 X | X | X 

Moves: X6 O5 X8 O1 X9 O3 X7

New game | Computer goes first | Undo

Play the recursive version ↻

No JavaScript. Every square is a link. Works in curl, lynx, or a browser.