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update the WDL model

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The patch only changes the displayed cp and wdl values.

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

No functional change
This commit is contained in:
Robert Nurnberg @ elitebook
2024-04-16 08:23:42 +02:00
committed by Joost VandeVondele
parent d0e72c19fa
commit 6fc7da44ad
1 changed files with 2 additions and 2 deletions
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4
src/uci.cpp
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@@ -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];