From 5de3198f9d668ac93a90d7f9eb95ca77133058c3 Mon Sep 17 00:00:00 2001
From: Paul Tsouchlos <developer.paul.123@gmail.com>
Date: Thu, 19 Feb 2026 15:49:31 -0500
Subject: [PATCH] chore: clamp pvs depth reduction to 0

No functional change according to bench but not 100% sure.

bench: 877749
---
 engine/src/search.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/engine/src/search.rs b/engine/src/search.rs
index 1b0bd191..3c5ee9e3 100644
--- a/engine/src/search.rs
+++ b/engine/src/search.rs
@@ -558,7 +558,7 @@ impl<'a, Log: LogLevel> Search<'a, Log> {
                     };
 
                     // Calculate the reduced depth
-                    let reduced_depth = depth.saturating_sub(reduction);
+                    let reduced_depth = depth.saturating_sub(reduction).max(0);
 
                     // Search with a null window at a reduced depth
                     let mut temp_score = -self.negamax::<NonPvNode>(board, reduced_depth, ply + 1, -alpha_use - 1, -alpha_use, &mut local_pv);