Teaching and testing noughts and crosses game (Tic-tac-toe)
User can play against the computer at four levels of computer skill; if requested, computer will explain its moves.
Computer will also play against itself (WOPR mode). In that case, O is the specified skill level and X is always Poor (random play).
Results from random testing of at least 28,000 games, with X always Poor and O as selected, are:
| O Skill level | X Wins | Draw | X loses |
|---|---|---|---|
| Poor | 58% | 13% | 29% |
| Medium | 6% | 24% | 70% |
| Crowley and Siegler | 0% | 9% | 91% |
| Expert | 0% | 11% | 89% |
Although the Poor line in the table involves both sides playing with the same 'Poor' skill level, because X goes first, the results are not symmetric.