noughts & crosses
or
  tic tac toe
  1. Introduction
  2. Study some games in progress
  3. The ten different combinations
  4. Categorising the combinations - 1st attempt
  5. Categorising the combinations - 2nd attempt
  6. Check out the Category Scheme
  7. Arrange the categories from good to bad
  8. Assigning Scores to the Categories
  9. Trying out your system
  10. The programming starts
  11. Playing with the 9 turtles
  12. clear, ox, do_nought and do_cross procedures
  13. Scoring any position
  14. best_move procedure
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