From eacc748137d13f41ff34311571910797d8557d88 Mon Sep 17 00:00:00 2001
From: Adarsh Das <adarshdas950@gmail.com>
Date: Sat, 6 Jun 2026 20:21:01 +0530
Subject: [PATCH] Stop search on finding mated in 2, mate in 1 or mate in 2

Implementation of:
https://github.com/official-stockfish/Stockfish/pull/6879

Bench: 3204302

Co-authored-by: Robert Nurnberg <28635489+robertnurnberg@users.noreply.github.com>
---
 src/search.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/search.rs b/src/search.rs
index 984fc3b71..79d283e54 100644
--- a/src/search.rs
+++ b/src/search.rs
@@ -269,7 +269,10 @@ pub fn start(td: &mut ThreadData, report: Report, thread_count: usize) {
             td.shared.soft_stop_votes.fetch_sub(1, Ordering::AcqRel);
         }
 
-        if td.shared.status.get() == Status::STOPPED {
+        if td.shared.status.get() == Status::STOPPED
+            || (!matches!(td.time_manager.limits(), Limits::Infinite)
+                && (td.root_moves[0].score == mated_in(2) || td.root_moves[td.multi_pv - 1].score >= mate_in(3)))
+        {
             break;
         }
     }