From 435ba3dbb5ceb081592233d9f4b71e51c492dc22 Mon Sep 17 00:00:00 2001
From: Viren6 <94880762+Viren6@users.noreply.github.com>
Date: Sun, 19 Jan 2025 17:18:23 +0000
Subject: [PATCH] Revert "Moving up the if position is or has been on the PV
 reduction"

Passed VVLTC 1:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 68362 W: 17830 L: 17523 D: 33009
Ptnml(0-2): 9, 6253, 21347, 6566, 6
https://tests.stockfishchess.org/tests/view/6790271cfc8c306ba6cea2c1

Passed VVLTC 2:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 113256 W: 29158 L: 28721 D: 55377
Ptnml(0-2): 13, 10521, 35122, 10960, 12
https://tests.stockfishchess.org/tests/view/678d3e47d63764e34db491a3

closes https://github.com/official-stockfish/Stockfish/pull/5815

bench 1943998
---
 src/search.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/search.cpp b/src/search.cpp
index f2363162..990cbae3 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -982,10 +982,6 @@ moves_loop:  // When in check, search starts here
 
         Depth r = reduction(improving, depth, moveCount, delta);
 
-        // Decrease reduction if position is or has been on the PV (*Scaler)
-        if (ss->ttPv)
-            r -= 1037 + (ttData.value > alpha) * 965 + (ttData.depth >= depth) * 960;
-
         // Step 14. Pruning at shallow depth.
         // Depth conditions are important for mate finding.
         if (!rootNode && pos.non_pawn_material(us) && !is_loss(bestValue))
@@ -1146,6 +1142,9 @@ moves_loop:  // When in check, search starts here
         uint64_t nodeCount = rootNode ? uint64_t(nodes) : 0;
 
         // Decrease reduction for PvNodes (*Scaler)
+        if (ss->ttPv)
+            r -= 1037 + (ttData.value > alpha) * 965 + (ttData.depth >= depth) * 960;
+
         if (PvNode)
             r -= 1018;