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aywrite merged 1 commit into from
Oct 11, 2026
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docs(docs): List multi-cut, the attention refits and the quiet tie break as rejected #396

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23 changes: 23 additions & 0 deletions docs/ROADMAP.md
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Expand Up @@ -668,3 +668,26 @@ of these again without saying what is different this time.
the share. -7 ±11 over 2,000 games at 10+0.1 against 621ecab (sprt [0, 10] failed at
LLR -3.79). The candidate ended 436 ms ahead on the clock and spent 0.624 of its share
against 0.692, so the time it banked was never spent.
- Multi-cut at a singular test node: when the search with the table move excluded comes
back at or over a window that is itself at or over beta, answer that window as a fail
high without searching the table move. It fired on 17.3% of the bench's eligible nodes
and 1.6% of the games suite's, and read +2 ±21 over 300 pairs at 200,000 nodes a move.
The match against 048dfa7 capped unresolved at +5 ±7 over 4,000 games at 10+0.1 (sprt
[0, 10], LLR 0.09).
- Refitting the late move pruning skip as a logistic model over the move as well as the
node, in place of the evaluation's margin under beta: history kept signed rather than
clamped at zero, the window's width, the index bands, the killer and the table word,
with the threshold matched to the margin's skip count. Fitted on a million rows from
10,000 game positions, it skipped 37 moves that mattered on the held out half against
the margin's 47, and lost -15 ±15 over 1,000 games at 10+0.1 against 93e5b1b (sprt
[0, 10] failed at LLR -3.08). Its depth weight, fitted on rows nearly all at depths four
to six, made the skip more aggressive with depth where the margin grows more cautious.
With depth entering only through the margin's own line, the same features lost
-9 ±12 over 1,500 games (LLR -3.48) while skipping within half a percent of the
margin's count at every depth. The per move features are worth nothing measurable over
the margin.
- Ordering the quiet moves the killers and the history score at zero by their change to
the evaluation, largest first, rather than in generated order. With the piece square
and pair term change, -4 ±9 over 3,000 games at 10+0.1 against 2d7fe54 (sprt [0, 10]
failed at LLR -4.58), at 0.945 to 0.961 times master's nodes a second; with the piece
square change alone, -6 ±9 over 2,500 games (LLR -4.76).
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