Rollouts and policy iterationfeatured
Rollout veto
Keep the depth-4 search's move unless replaying every column forward for twenty-five moves says, across all seven imagined futures, that another one is better.
recordedApproaches
Each page here is one theory of how to choose a column, grouped by the technique it uses; the engines that play the games and the instruments that measure them live under Engines and Diagnostics.
Rollouts and policy iteration
Judge a column by playing many moves forward with a fast policy, and let that overrule the search when the evidence is strong.
Read the primer →No approach page matches that search.