diff options
| author | Scott Gasch <[email protected]> | 2026-10-13 23:22:10 -0700 |
|---|---|---|
| committer | Scott Gasch <[email protected]> | 2026-10-13 23:22:10 -0700 |
| commit | dad4620a92f51a1d0825fc99fa98fd2b16c0f280 (patch) | |
| tree | 865a0f210b6d3ad49779617ba73a3e04c02aad4e /src/GNUmakefile | |
| parent | 7400001fc2d43a507b54281f9860c60177860fe5 (diff) | |
Add alpha-side static null-move skip gate and Search() perf hoists
Reuses the joint FH% table on the iEval <= iAlpha side to skip the
null-move probe attempt when it's predicted unlikely to succeed
(EV-neutral: the real move loop still runs regardless). Also hoists
several node-constant computations (ImproveBucket, MP split-eligibility
checks) out of the per-move loop in Search(), and adds GNUmakefile
overrides for sweeping NULLMOVE_SKIP_FH_CEILING_THOUSANDTHS and
SKIP_SELECT_AFTER_N_MOVES from the command line.
Self-play vs. head is trending positive overnight (1020 games,
llr=+1.36, score=0.527) but not yet conclusive -- committing now to
checkpoint the change while the match continues.
Co-Authored-By: Claude Sonnet 5 <[email protected]>
Diffstat (limited to 'src/GNUmakefile')
| -rw-r--r-- | src/GNUmakefile | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/GNUmakefile b/src/GNUmakefile index 5879d31..2cd1462 100644 --- a/src/GNUmakefile +++ b/src/GNUmakefile @@ -292,6 +292,22 @@ ifdef PRUNE_LIVE PROFILE += -DPRUNE_LIVE=$(PRUNE_LIVE) endif +# 2026-10-13: override search.c's NULLMOVE_SKIP_FH_CEILING_THOUSANDTHS +# default (300, validated -- see search.c's own comment) from the +# command line for sweeping, e.g. `gmake ... NULLMOVE_SKIP_CEILING=1000` +# -- search.c's #define is guarded with #ifndef so this wins without +# editing the source. +ifdef NULLMOVE_SKIP_CEILING +PROFILE += -DNULLMOVE_SKIP_FH_CEILING_THOUSANDTHS=$(NULLMOVE_SKIP_CEILING) +endif + +# 2026-10-13: override movesup.c's SelectBestWithHistory skip- +# selection-sort threshold for sweeping, e.g. +# `gmake ... SKIP_SELECT_N=6`. +ifdef SKIP_SELECT_N +PROFILE += -DSKIP_SELECT_AFTER_N_MOVES=$(SKIP_SELECT_N) +endif + ifdef NEUTRALIZE_NULL_BAILOUT PROFILE += -DNEUTRALIZE_NULL_BAILOUT endif |