From 02eae528330347b4c91f3d8fa4de7fc8629a5ac0 Mon Sep 17 00:00:00 2001
From: FauziAkram <fauzi.dabat@hotmail.com>
Date: Thu, 30 May 2024 20:44:21 +0300
Subject: [PATCH] Simplifying the malus for putting piece en prise formula

Simplifying the malus for putting piece en prise
formula by merging the minor pieces and pawns
(removing the pawn exclusion from the formula).

Passed STC:
https://tests.stockfishchess.org/tests/view/66578d9c6b0e318cefa8d441
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 314272 W: 80705 L: 80786 D: 152781
Ptnml(0-2): 873, 37577, 80366, 37398, 922

Passed LTC (before rebasing):
https://tests.stockfishchess.org/tests/view/6657b5ee6b0e318cefa8d6ab
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 117000 W: 29447 L: 29324 D: 58229
Ptnml(0-2): 47, 12877, 32535, 12988, 53

Passed LTC (also after rebasing):
https://tests.stockfishchess.org/tests/view/6658803d6b0e318cefa8fd99
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 244992 W: 61807 L: 61814 D: 121371
Ptnml(0-2): 125, 27420, 67414, 27411, 126

closes https://github.com/official-stockfish/Stockfish/pull/5316

Bench: 1484840
---
 src/movepick.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/movepick.cpp b/src/movepick.cpp
index 6c41916c..b6828a30 100644
--- a/src/movepick.cpp
+++ b/src/movepick.cpp
@@ -199,8 +199,7 @@ void MovePicker::score() {
             // malus for putting piece en prise
             m.value -= (pt == QUEEN  ? bool(to & threatenedByRook) * 49000
                         : pt == ROOK ? bool(to & threatenedByMinor) * 24335
-                        : pt != PAWN ? bool(to & threatenedByPawn) * 14950
-                                     : 0);
+                                     : bool(to & threatenedByPawn) * 14900);
         }
 
         else  // Type == EVASIONS