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Reverse Futility Pruning Margin Tweak #393

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merged 2 commits into from
Jun 30, 2022
Merged

Reverse Futility Pruning Margin Tweak #393

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caf1eca
Bench: 5842031
jhonnold Jun 29, 2022
b41bf9b
Bench: 5842031
jhonnold Jun 30, 2022
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2 changes: 1 addition & 1 deletion src/makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
EXE = berserk
SRC = *.c pyrrhic/tbprobe.c noobprobe/*.c
CC = gcc
VERSION = 20220620
VERSION = 20220629
MAIN_NETWORK = networks/berserk-11a8ee076cec.nn
EVALFILE = $(MAIN_NETWORK)
DEFS = -DVERSION=\"$(VERSION)\" -DEVALFILE=\"$(EVALFILE)\" -DNDEBUG
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2 changes: 1 addition & 1 deletion src/search.c
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Expand Up @@ -412,7 +412,7 @@ int Negamax(int alpha, int beta, int depth, int cutnode, ThreadData* thread, PV*

// Reverse Futility Pruning
// i.e. the static eval is so far above beta we prune
if (depth <= 6 && !skipMove && eval - 50 * (depth - (improving && !oppThreat.pcs)) > beta && eval < WINNING_ENDGAME)
if (depth <= 6 && !skipMove && eval - 75 * (depth - (improving && !oppThreat.pcs)) > beta && eval < WINNING_ENDGAME)
return eval;

// Razoring
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