From 2f3e6198e878818f9f90de8cb31e287de34bed0e Mon Sep 17 00:00:00 2001
From: FauziAkram <fauzi.dabat@hotmail.com>
Date: Sun, 13 Oct 2024 13:59:20 +0300
Subject: [PATCH] Simplify optimism divisor.

Passed STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 139360 W: 36143 L: 36033 D: 67184
Ptnml(0-2): 436, 16456, 35778, 16582, 428
https://tests.stockfishchess.org/tests/view/66fc49c786d5ee47d953b94e

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 257748 W: 65163 L: 65184 D: 127401
Ptnml(0-2): 173, 28471, 71611, 28442, 177
https://tests.stockfishchess.org/tests/view/66ff01ae86d5ee47d953bb54

Passed LTC against rebased version:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 53610 W: 13691 L: 13501 D: 26418
Ptnml(0-2): 52, 5942, 14605, 6176, 30
https://tests.stockfishchess.org/tests/view/670a9c5c86d5ee47d953c231

closes https://github.com/official-stockfish/Stockfish/pull/5633

Bench: 1282078
---
 src/evaluate.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index 802913a0..7c7b54a4 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -75,7 +75,7 @@ Value Eval::evaluate(const Eval::NNUE::Networks&    networks,
 
     // Blend optimism and eval with nnue complexity
     int nnueComplexity = std::abs(psqt - positional);
-    optimism += optimism * nnueComplexity / (smallNet ? 430 : 474);
+    optimism += optimism * nnueComplexity / 468;
     nnue -= nnue * nnueComplexity / (smallNet ? 20233 : 17879);
 
     int material = (smallNet ? 553 : 532) * pos.count<PAWN>() + pos.non_pawn_material();