Computer wins. Better luck next time.
O | X | O ---+---+--- X | O | ---+---+--- O | X | X
Moves: X8 O5 X4 O1 X9 O7 X2 O3
New game | Computer goes first | Undo
Play the recursive version ↻
No JavaScript. Every square is a link. Works in curl, lynx, or a browser.