From 421f7b74c618b69afbaf0fdc0a5f69601a867466 Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Sun, 5 Dec 2010 17:54:35 +0100 Subject: [PATCH] Increase PV LMR to SF 1.8 levels Non-PV LMR is left unchanged. After 8819 games Mod- Orig: 1442 - 1343 - 6034 ELO +3 (+- 2.9) LOS 86% Signed-off-by: Marco Costalba --- src/search.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/search.cpp b/src/search.cpp index 66a27fa6..12481d40 100644 --- a/src/search.cpp +++ b/src/search.cpp @@ -347,7 +347,7 @@ void init_search() { // Init reductions array for (hd = 1; hd < 64; hd++) for (mc = 1; mc < 64; mc++) { - double pvRed = 0.33 + log(double(hd)) * log(double(mc)) / 4.5; + double pvRed = log(double(hd)) * log(double(mc)) / 3.0; double nonPVRed = 0.33 + log(double(hd)) * log(double(mc)) / 2.25; ReductionMatrix[PV][hd][mc] = (int8_t) ( pvRed >= 1.0 ? floor( pvRed * int(ONE_PLY)) : 0); ReductionMatrix[NonPV][hd][mc] = (int8_t) (nonPVRed >= 1.0 ? floor(nonPVRed * int(ONE_PLY)) : 0); -- 2.39.2