From 6138a0fd0e43753a86e4a170a5f6e2b7b6752677 Mon Sep 17 00:00:00 2001
From: Dubslow <bunslow@gmail.com>
Date: Sun, 30 Jun 2024 19:22:04 -0400
Subject: [PATCH] Probcut in check no matter if pv or capture

Passed STC: https://tests.stockfishchess.org/tests/view/6681e9c8c1657e386d294cef
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 217824 W: 56149 L: 56129 D: 105546
Ptnml(0-2): 587, 25926, 55848, 25982, 569

Passed LTC: https://tests.stockfishchess.org/tests/view/6681fcb8c1657e386d294db1
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 357552 W: 90546 L: 90671 D: 176335
Ptnml(0-2): 207, 40064, 98362, 39933, 210

Each half of this also passed STC+LTC separately

closes https://github.com/official-stockfish/Stockfish/pull/5427

bench 1227870
---
 src/search.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/search.cpp b/src/search.cpp
index 2e8d47cf952..31278241c79 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -906,9 +906,8 @@ Value Search::Worker::search(
 
     // Step 12. A small Probcut idea, when we are in check (~4 Elo)
     probCutBeta = beta + 388;
-    if (ss->inCheck && !PvNode && ttCapture && (ttData.bound & BOUND_LOWER)
-        && ttData.depth >= depth - 4 && ttData.value >= probCutBeta
-        && std::abs(ttData.value) < VALUE_TB_WIN_IN_MAX_PLY
+    if (ss->inCheck && (ttData.bound & BOUND_LOWER) && ttData.depth >= depth - 4
+        && ttData.value >= probCutBeta && std::abs(ttData.value) < VALUE_TB_WIN_IN_MAX_PLY
         && std::abs(beta) < VALUE_TB_WIN_IN_MAX_PLY)
         return probCutBeta;