From 4e9fded5a63a2a72964f6d3518e2f66186662d05 Mon Sep 17 00:00:00 2001
From: Linmiao Xu <linmiao.xu@gmail.com>
Date: Sat, 6 Jul 2024 16:04:07 -0400
Subject: [PATCH] Larger bonus when updating quiet stats

Also removes unused arguments to update_all_stats to
fix compiler warnings about unused parameters.

Passed non-regression STC:
https://tests.stockfishchess.org/tests/view/6689a79a0fdd852d63cf52e9
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 26496 W: 6901 L: 6669 D: 12926
Ptnml(0-2): 62, 3094, 6715, 3304, 73

Passed non-regression LTC:
https://tests.stockfishchess.org/tests/view/6689a9960fdd852d63cf532d
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 41214 W: 10373 L: 10173 D: 20668
Ptnml(0-2): 11, 4491, 11412, 4673, 20

closes https://github.com/official-stockfish/Stockfish/pull/5456

bench 1169958
---
 src/search.cpp | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/src/search.cpp b/src/search.cpp
index 9b0ea9df..3f160047 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -131,8 +131,6 @@ void update_all_stats(const Position& pos,
                       Stack*          ss,
                       Search::Worker& workerThread,
                       Move            bestMove,
-                      Value           bestValue,
-                      Value           beta,
                       Square          prevSq,
                       Move*           quietsSearched,
                       int             quietCount,
@@ -1362,8 +1360,8 @@ moves_loop:  // When in check, search starts here
 
     // If there is a move that produces search value greater than alpha we update the stats of searched moves
     else if (bestMove)
-        update_all_stats(pos, ss, *this, bestMove, bestValue, beta, prevSq, quietsSearched,
-                         quietCount, capturesSearched, captureCount, depth);
+        update_all_stats(pos, ss, *this, bestMove, prevSq, quietsSearched, quietCount,
+                         capturesSearched, captureCount, depth);
 
     // Bonus for prior countermove that caused the fail low
     else if (!priorCapture && prevSq != SQ_NONE)
@@ -1772,8 +1770,6 @@ void update_all_stats(const Position& pos,
                       Stack*          ss,
                       Search::Worker& workerThread,
                       Move            bestMove,
-                      Value           bestValue,
-                      Value           beta,
                       Square          prevSq,
                       Move*           quietsSearched,
                       int             quietCount,
@@ -1790,10 +1786,7 @@ void update_all_stats(const Position& pos,
 
     if (!pos.capture_stage(bestMove))
     {
-        int bestMoveBonus = bestValue > beta + 172 ? quietMoveBonus      // larger bonus
-                                                   : stat_bonus(depth);  // smaller bonus
-
-        update_quiet_stats(pos, ss, workerThread, bestMove, bestMoveBonus);
+        update_quiet_stats(pos, ss, workerThread, bestMove, quietMoveBonus);
 
         // Decrease stats for all non-best quiet moves
         for (int i = 0; i < quietCount; ++i)