From 37e67a3505a6027e2a9b5314a3667dafc8d60c10 Mon Sep 17 00:00:00 2001
From: dsekercioglu <dsekercioglu2003@gmail.com>
Date: Sun, 6 Aug 2023 12:38:30 +0200
Subject: [PATCH] Reduce singular extension margin

---
 src/bm/bm_search/search.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/bm/bm_search/search.rs b/src/bm/bm_search/search.rs
index 3b511b8f..ffe99e8e 100644
--- a/src/bm/bm_search/search.rs
+++ b/src/bm/bm_search/search.rs
@@ -337,7 +337,7 @@ pub fn search<Search: SearchType>(
                 && entry.depth() + 2 >= depth
                 && matches!(entry.entry_type(), EntryType::LowerBound | EntryType::Exact)
             {
-                let s_beta = entry.score() - depth as i16 * 3;
+                let s_beta = entry.score() - depth as i16 * 2;
                 local_context.search_stack_mut()[ply as usize].skip_move = Some(make_move);
 
                 let multi_cut = depth >= 5;