From: VoyagerOne <excelgeek@gmail.com>
Date: Fri, 4 Nov 2016 00:29:34 +0000 (-0400)
Subject: Reduction Simplification
X-Git-Url: https://git.sesse.net/?p=stockfish;a=commitdiff_plain;h=b915fdc889e7e154e030189d277b5242433407b4;hp=67d19447f45fbfb01a359530549b0fffeb11f61f

Reduction Simplification

Simplify reduction formula by removing a parameter.

STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 35798 W: 6368 L: 6272 D: 23158

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 125375 W: 15827 L: 15839 D: 93709

Bench: 4735038
---

diff --git a/src/search.cpp b/src/search.cpp
index 9c3e17b6..0ed6b191 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -183,8 +183,6 @@ void Search::init() {
           for (int mc = 1; mc < 64; ++mc)
           {
               double r = log(d) * log(mc) / 2;
-              if (r < 0.80)
-                continue;
 
               Reductions[NonPV][imp][d][mc] = int(std::round(r));
               Reductions[PV][imp][d][mc] = std::max(Reductions[NonPV][imp][d][mc] - 1, 0);