Slides for the third week of lectures, on adversarial search. You should be able to use Acrobat Reader (or similar) to print these slides in hand-out format (i.e. with six or so slides per page). (Note that this is the third version of these slides. The second version had a small bug fix on Slide 13: " cut this" has been replaced by "cut exponent". In the third version I've also changed the order of the instructions in the alpha-beta pruning algorithm to make the state of the alpha and beta variables more consistent with the example; note that this doesn't change the outcome.)