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NumLeftoverMovesToSelect, indexed by remaining depth; make EFP's
leftover-only scope explicit.
SEARCH_SORT_LIMIT[ply] was a poor proxy for what actually matters here
-- how large the remaining subtree below this node is. Distance from
root only correlates with that when total search depth is roughly
fixed; it says nothing once extensions/reductions/iterative-deepening
are in play. NumLeftoverMovesToSelect(ctx, uDepth) uses remaining depth
instead, only ever consulted once every high-performer move (winning/
even capture, killer, killer-mate -- anything >= GOOD_MOVE) has already
been exhausted; this never limits how many of *those* get selected,
only how much further care to spend on the ordinary/leftover tail.
Table values carried over verbatim from the old one as an untuned
starting point, just reindexed.
Also adds an explicit (TRUE == fInLeftovers) gate to EFP's per-move
checklist (landed last commit) -- every high-performer move was already
excluded as a side effect of the capture/check/killer exemptions, but
this makes "EFP only ever touches leftovers" a real, direct condition
rather than an emergent property of unrelated checks.
Verified against HEAD (commit bb07fbd) at sd10:
ecm_ringers: 9/11 -> 10/11 (+1 solve), ~flat nodes (-0.04%)
ecm_confident_quick: 88/90 -> 88/90 (even), +0.43% nodes
ecm_hard_quick: 15/90 -> 18/90 (+3 solves), +4.4% nodes
Net +4 solves across 269 positions for a negligible node-count cost.
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EBF/beta-cutoff/counter-move stats, script.c FPE fix.
No LMR, no counter-move-driven move ordering (both explored separately,
kept out for now -- counter-move measured worse, ~655->647 solved on
ecm879 @ sn=4M with a leaner tree beforehand). Futility pruning restored.
Verified: 647/879 solved, EBF 4.609 @ sn=4M; 684/879 solved, EBF 3.995
@ 20s/move, 1cpu, 256m hash (typhoon_baseline.log).
The counter-move table is still written and its stats still tracked
(dynamic.c) for diagnostic purposes, but generate.c no longer reads it
for move ordering, so it has no effect on search behavior in this
commit.
lmr_testing/ holds the in-flight graded-LMR + counter-move code (not
applied here) with notes on what was already tried and measured, so a
future session can resume without re-deriving it.
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