Depth-4 search and long outcomesfeatured
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.
Depth-4 search and long outcomes
Judges moves over 25-step continuations, then tries to retain only choices that survive the longer view.
Terminal policy iteration
Play every move forward many times, then override the reference only when one move produces clearly longer, higher-scoring games.
No approach page matches that search.