Artificial Intelligence / Unit 3 AI 0156 short lesson, about 20 seconds
The Evaluation Function
Captions available
The idea
Real game programs search partway down, then score unfinished positions with an evaluation function — a judgment standing in for the unaffordable truth.
In practice
The move is the heuristic idea from Unit 2, pointed at game trees: an estimate where exact scoring cannot reach.
Where people slip
The program's play is only as sound as the judging function at the search frontier.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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