Since you’re here...

... we have a small favour to ask. More people, like you, are reading and supporting our blog: "Chess Engines Diary". And unlike many other sites and blogs, we made the choice to keep our articles open for all, regardless of where they live or what they can afford to pay.

We hope you will consider supporting us today. We need your support to continue to exist, because good entries are more and more work time. Every reader contribution, however big or small, is so valuable. Support "Chess Engines Diary" even a small amount– and it only takes a minute. Thank you.

============================== My email: jotes@go2.pl



Stockfish 18012814 - new version!

Stockfish, chess engine UCI

Rating JCER = 3389
🔬 Author: syzygy1

Timestamp: 1517146807 

This modifies the in-search TB probing to continue searching for a mate "behind" a TB win (or loss). (#1285) 

It does the following: 
- If a TB win or loss value allows an alpha or beta cutoff, the cutoff is taken. 
- Otherwise, the search of the current subtree continues. In PV nodes, the final value returned is adjusted to reflect that the position is a TB win (or loss). 

The patch also fixes a potential problem caused by root_probe() and root_probe_wdl() dirtying the root-move scores. 

This patch removes the limitation of current master that a mate is never found if the root position is not yet in the TBs, but the path to mate at some point enters the TBs. The patch is intended to preserve the efficiency and effectiveness of the current TB probing approach. 

No functional change (withouth TB)
⭐⭐⭐   Stockfish 18012814 - download

Comments

Popular posts from this blog

New version chess engine: Lc0 BT4

Killfish 071223 wins Strong Engines Tournament (Tests by Jörn Gronemann, Heide, 2024.02.26)

New chess engine: HypnoS 190324 (derived from Stockfish)

SF-PRO 23.02.2024 wins Strong Engines Tournament (Tests by Jörn Gronemann, Heide, 2024.03.01)

INCOGNITO 7 and Killfish 130324 wins Strong Engines Tournament (Tests by Jörn Gronemann, Heide, 2024.03.15)

SF-PRO 08.03.2024 wins New Engines Test, 09-10.03.2024

Chess engine: SF 16.1 MPV