From 75c8cb2c2f7d687d3ba02eac2088860b625acd47 Mon Sep 17 00:00:00 2001
From: Michael Chaly <Vizvezdenec@gmail.com>
Date: Sat, 6 Jul 2024 22:21:33 +0300
Subject: [PATCH] Adjust usage of previous statscore in bonus assignments

This patch adjusts usage of previous statscore for bonus assginments - allowing
it for any statscores and clamping it to wider range.

Passed STC:
https://tests.stockfishchess.org/tests/view/66892e76e59d990b103f6a91
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 431520 W: 111767 L: 110872 D: 208881
Ptnml(0-2): 1180, 51165, 110133, 52144, 1138

Passed LTC:
https://tests.stockfishchess.org/tests/view/66897176e59d990b103f9605
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 143184 W: 36463 L: 35929 D: 70792
Ptnml(0-2): 55, 15540, 39863, 16084, 50

closes https://github.com/official-stockfish/Stockfish/pull/5455

bench 1330556
---
 src/search.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/search.cpp b/src/search.cpp
index 153eba18..9b0ea9df 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1373,8 +1373,7 @@ moves_loop:  // When in check, search starts here
                      + 153 * (!(ss - 1)->inCheck && bestValue <= -(ss - 1)->staticEval - 76));
 
         // Proportional to "how much damage we have to undo"
-        if ((ss - 1)->statScore < -7865)
-            bonus += std::clamp(-(ss - 1)->statScore / 103, 0, 258);
+        bonus += std::clamp(-(ss - 1)->statScore / 100, -50, 274);
 
         update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq,
                                       stat_bonus(depth) * bonus / 100);