From 6fc7da44ad9c7e2ba6062d5c79daafd29a4dcd6f Mon Sep 17 00:00:00 2001
From: "Robert Nurnberg @ elitebook" <robert.nurnberg@gmx.de>
Date: Tue, 16 Apr 2024 08:23:42 +0200
Subject: [PATCH] update the WDL model

The patch only changes the displayed cp and wdl values.

closes https://github.com/official-stockfish/Stockfish/pull/5178

No functional change
---
 src/uci.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/uci.cpp b/src/uci.cpp
index 8e20207b..c707f6dc 100644
--- a/src/uci.cpp
+++ b/src/uci.cpp
@@ -330,8 +330,8 @@ WinRateParams win_rate_params(const Position& pos) {
     double m = std::clamp(material, 10, 78) / 58.0;
 
     // Return a = p_a(material) and b = p_b(material), see github.com/official-stockfish/WDL_model
-    constexpr double as[] = {-185.71965483, 504.85014385, -438.58295743, 474.04604627};
-    constexpr double bs[] = {89.23542728, -137.02141296, 73.28669021, 47.53376190};
+    constexpr double as[] = {-150.77043883, 394.96159472, -321.73403766, 406.15850091};
+    constexpr double bs[] = {62.33245393, -91.02264855, 45.88486850, 51.63461272};
 
     double a = (((as[0] * m + as[1]) * m + as[2]) * m) + as[3];
     double b = (((bs[0] * m + bs[1]) * m + bs[2]) * m) + bs[3];