Computer wins. Better luck next time.
O | X | O ---+---+--- X | O | X ---+---+--- O | | X
Moves: X4 O5 X9 O1 X6 O3 X2 O7
New game | Computer goes first | Undo
Play the recursive version ↻
No JavaScript. Every square is a link. Works in curl, lynx, or a browser.