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Approaches

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.

Techniqueallexpectimaxheuristic-evaluationq-learningn-tuplennuepolicy-gradientevolutionmctsrollout-policy-iterationoracle-distillationrisk-survivalafterstateconstructive-planningdeterminization
Statusallcompletedrejectedruntime-pausedpreregisteredsupport-onlyproposal
Readsallpublicoracle/teacherdiagnostic
Group bytechniquefamily

2 approaches of 87

Afterstate learning

Judge the position a move leaves behind rather than the move itself, and build training data in which every column the player could have chosen has been measured, not guessed.

3333333seven afterstatesquantilesone number eachranked by the whole distribution
Afterstate learning

Distributional afterstate ranker

Measures every legal column under aligned futures and trains one network to rank the resulting positions.

rejectedrecorded
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Value and policy learning

Instead of searching ahead, train a model on past games to judge a board or pick a column, and learn why that kept failing.

6623267124351625364251644444443614one tapeone rootseven siblingsthe gap, not the value
Value and policy learning

Sibling advantage

Stop asking how good a board is. Replay all seven columns through exactly the same imagined future and learn only which one came out ahead.

rejected
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No approach page matches that search.

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