From 9fec298cf12bd5697aa978d115c4b456d291a6de Mon Sep 17 00:00:00 2001
From: "Shahin M. Shahin" <peregrineshahin@gmail.com>
Date: Tue, 26 May 2026 08:39:21 +0300
Subject: [PATCH] Prevent SEE-pruning the quiet blockers when in check

Elo   | 3.10 +- 2.16 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 2.97 (-2.25, 2.89) [0.00, 3.00]
Games | N: 26710 W: 6846 L: 6608 D: 13256
Penta | [87, 3112, 6732, 3324, 100]
https://recklesschess.space/test/14984/

Elo   | 1.61 +- 1.29 (95%)
SPRT  | 40.0+0.40s Threads=1 Hash=64MB
LLR   | 2.92 (-2.25, 2.89) [0.00, 3.00]
Games | N: 63616 W: 15869 L: 15575 D: 32172
Penta | [27, 7047, 17377, 7319, 38]
https://recklesschess.space/test/14986/

Bench: 2756239
---
 src/search.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/search.rs b/src/search.rs
index ffc7b8262..f7901aba8 100644
--- a/src/search.rs
+++ b/src/search.rs
@@ -781,7 +781,7 @@ fn search<NODE: NodeType>(
                 (-7 * depth * depth - 31 * depth - 32 * history / 1024 + 16).min(0)
             };
 
-            if !td.board.see(mv, threshold) {
+            if (!in_check || !is_quiet) && !td.board.see(mv, threshold) {
                 continue;
             }
         }