From: Michael Chaly <Vizvezdenec@gmail.com>
Date: Sat, 29 Jan 2022 03:39:40 +0000 (+0300)
Subject: Do stats updates after LMR for captures
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=90d051952f4fce415f09f316e24e1701aafa7a92;p=stockfish

Do stats updates after LMR for captures

Since captures that are in LMR use continuation histories of corresponding quiet moves it makes sense to update this histories if this capture passes LMR by analogy to existing logic for quiet moves.

Passed STC
https://tests.stockfishchess.org/tests/view/61f367eef7fba9f1a4f1318b
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 208464 W: 56006 L: 55407 D: 97051
Ptnml(0-2): 964, 23588, 54655, 23935, 1090

Passed LTC
https://tests.stockfishchess.org/tests/view/61f41e34f7fba9f1a4f15241
LLR: 2.96 (-2.94,2.94) <0.50,3.00>
Total: 69144 W: 18793 L: 18441 D: 31910
Ptnml(0-2): 65, 6982, 20142, 7302, 81

closes https://github.com/official-stockfish/Stockfish/pull/3910

bench 4637392
---

diff --git a/src/search.cpp b/src/search.cpp
index c3360ad1..8d5ad979 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1194,11 +1194,14 @@ moves_loop: // When in check, search starts here
           value = -search<NonPV>(pos, ss+1, -(alpha+1), -alpha, newDepth + doDeeperSearch, !cutNode);
 
           // If the move passed LMR update its stats
-          if (didLMR && !captureOrPromotion)
+          if (didLMR)
           {
               int bonus = value > alpha ?  stat_bonus(newDepth)
                                         : -stat_bonus(newDepth);
 
+              if (captureOrPromotion)
+                  bonus /= 4;
+
               update_continuation_histories(ss, movedPiece, to_sq(move), bonus);
           }
       }