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weigh the opponent's best reply to a move - #390

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andy-k merged 1 commit into
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weigh-the-opponents-best-reply-to-a-move
Nov 2, 2026
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andy-k merged 1 commit into
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weigh-the-opponents-best-reply-to-a-move

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@andy-k andy-k commented Nov 2, 2026

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Every full rack the opponent could hold is valued at its best reply on
the board after the move, as the census sheet values a reply, and
weighed by its chance to be dealt; or, given the leaves the opponent's
last move is inferred to have kept, by those leaves' weights, each drawn
to a full rack from the rest. The sums over the deals are exact, and
give the reply's mean, its variance, and the chance that the rack can
play all its tiles. A move that empties the bag is left to the endgame.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
@andy-k
andy-k merged commit 64fe9ba into main Nov 2, 2026
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