Interesting Stockfish patch 23.9.

[Jouni]

Detect search explosions. I have seen many positions, where SF outputs nothing in 30 minutes. Hope this helps! Mostly for position analysis not much effect in normal play I quess. My suggestion previously was, that SF outputs something after every 5 or 10 minutes to see program isn't crashed.

[Jouni]

I compared patch to 21.9. version. They have same bench. So no difference in small depths or bullet games . But in test suites 23.9. version is clearly better! Even if I don't see any clearly pathological positions. In all test suites it is better up to 10%. Example: In ACT4 21.9. solved 51 but 23.9. 57. Here's example position from framework [fen]8/Pk6/8/1p6/8/P1K5/8/6B1 w - - 37 130[/fen] SF 14 has explosion, but patch solves this.

[Rebel]

In endgames like these it's helpful to limit the check extensions after a promotion in the tree, fixes explosions.