[tvtpvezr] Fun with tic tac toe

Tic tac toe is a boring draw (cat's game) if played normally by experienced people.  How can we make an interesting computer game?

1. A puzzle interface.  A position not normally encountered in a cat's game is presented as the starting position.  For additional difficulty, one or more of possible initial moves are disabled, requiring the user to find a nonobvious first move to maximize the outcome.

2. A swindler.  The computer occasionally plays losing moves in hopes of leading the human into an unfamiliar position where the human may mess up.

3. Blindfold mode, where, say, only the computer's most recent move is shown.

4. Blitz mode.  A chess clock limiting to, say, game in two seconds.