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Chess engine: Cwtch 4

on March 28, 2026

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Since you’re here...

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

Bread 3.0.0 wins New Engine Test, by Chess Engines Diary 2026.03.21-26

on March 28, 2026

Bread Engine engines tournaments

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Radiance 4.3 - new version chess engine

on March 27, 2026

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Catalyst 1.0.0 - new chess engine

on March 27, 2026

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Stockfish dev-20260318 wins Elite Engines Tournament, (Tests by Jörn Gronemann, 2026.03.27)

on March 27, 2026

Stockfish Tests by Jörn Gronemann

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Eeternal v3.1 - new version chess engine

on March 27, 2026

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Sykora 0.2.2 - new version chess engine

on March 27, 2026

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Rating Chess Engines Diary CEDR - 01.03.2026

3755.5 - Stockfish dev-20250906
3743.6 - Reckless 0.9.0-dev-2a847427
3733.3 - Obsidian 15.4
3731.4 - PlentyChess 7.0.41 SE
3726.9 - Integral 7 dev.8bab JA
3723.0 - Alexandria 8.1.2
3714.4 - Berserk 20250606
3712.9 - Dragon 3.3
3710.2 - Caissa 1.22
3706.8 - Lc0 0.32.0
3699.4 - Viridithas 19.0.1
3698.5 - Halogen 16.0.0
3698.4 - RubiChess 20250520
3697.2 - Tarnished 5.0
3695.0 - Clover 9.1 JA
3694.6 - Stormphrax 7.0.0
3689.4 - Quanticade Cronus 3.0
3687.3 - Horsie 1.0.6 JA
3682.4 - Pawnocchio 1.9.2
3680.0 - Motor 0.9.0

Most popular posts

We already have the new Fritz 20 program - what does it look like and how does it work?

The purchase process for the download version on the ChessBase website took only 5 minutes. Downloading the files from the cloud was even quicker. The installation itself, which involved five large files, took maybe 7 minutes, including restarting the system and entering the serial number I received upon purchase. The start image for Fritz 20 has a strange mosaic of colors; perhaps I'll get used to it. As you can see in the second screenshot, the program interface hasn't changed much; only the icons are different (we've been using Fritz 17 until now). It looks nice, but it's no major revolution. The next two screenshots show engine management and the installation of the UCI chess engine (here, Cataphract 1.1). As you can see, there are no changes. Screenshot no. 5 shows the analysis of some position by Fritz 20 engines. The changes are minimal - it is still very legible. Finally, on screen 6 we have the engine tournament table generated by Fritz 20 . I think it is sti...

New chess opening book: Perfect 2021 (abk, bin, bkt, ctg)

Opening book Perfect 2021 (abk, bin, bkt, ctg) - download

Dragon NNUE by Komodo Chess - it's free!

Dragon by Komodo Chess Larry Kaufman: We have released Dragon at komodochess.com. Dragon uses NNUE (Neural Network Updated Efficiently) technology, originally developed for the game of shogi. Komodo has a great deal of chess knowledge in its evaluation. Training an NNUE network based on this evaluation was both an advantage and a challenge, requiring experimentation with architectures and data generation of billions of positions. The reinforcement learning phase for Dragon is in its infancy, but is already showing great promise. Dragon is a huge strength improvement over 14.1, the last release, about 197 elo in MCTS mode and 189 elo in standard mode, at CCRL blitz time control on one thread based on direct matches. With four threads, the gains were 156 elo in MCTS and 170 in standard mode. The improvement is due to the embedded neural network providing much more accurate evaluation and also in some sense gaining an extra ply or so of search by “seeing” some tactics that a ...

Houdidit 6.03

Michael Byrne: It has been alleged that the chess engine Houdini 6.03 was based on part, the open source chess engine Stockfish. If true, this will allows anyone who purchased the engine access to the source under Stockfish's GPL license. I purchased the engine multiple times over the years and I am now pleased to make the source available to everyone, as it is my opinion that the allegations are true and the evidence provided is overwhelming. In addition, you will find some custom compiled versions of the engine available to all ( allowed under Stockfish's GPL license). The engine here has been renamed to Houdidit , as in guess "Who did it?" and to keep it different from the engine Mr. Houdart was selling which in my opinion was in violation of Stockfish's GPL , i.e, selling Houdini without disclosing it was based, in part, on the open source Stockfish, nor releasing its source. A full discussion of this issue may be found here: http://talkchess.com/foru...

New chess opening book: M11.2 (bin and ctg)

Here are two chess opening manuals in .bin and .ctg formats. This makes them work with almost any chess program or GUI. We understand that even the best opening manuals can have imperfections, but rest assured that ours is based on the analysis of highly rated games. We are sure you will enjoy testing it out! Book - CTG - what format is this? CTG Format Book Usage For customers looking to use the CTG format book, you'll need a Graphical User Interface (GUI) that can read this specific format. Chessbase GUIs are a great example of compatible software. To get started, simply save the book in your designated book folder. We highly recommend that you "Optimize" the book within the Book options dialog. This ensures the tournament moves are prioritized, making the book incredibly comprehensive even in tournament mode, unlike many other opening books. What is CTG? CTG is a book format primarily used by chess programs developed by Chessbase. This includes popular applications l...

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Chess Engines Diary - movie list

Lc0 BT4 - Lc0 0.30.0
Fisherov presentacion final
Marvin 6.0.0 - Cheng4 0.41
Game Zeus - Stockfish
Stockfish 290721 - Toltec Sambala
AI 28 0 - ShashChess GZ
Rebel 16.2 - Wasp 6 50
SFPRO 27.01.2024-Stockfish 20240117
CEDR - Logo Chess Engines
SF PRO 18.09.2024 - Stockfish 15.1
Dragon 3 3 - Stockfish 17
BigYuli GM 221024 - Stockfish 17 (1-0)
Caissa - Knightx
BigYuli GM 221024 - Stockfish 17 (0-1)
Quanticade 0.8 JA - Dog 2.5 JA for Android
Raid 3.7 TR vs Yuliana 6.0

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Chess Engine Diary - donate

Full acces to the folder: CHESS ENGINES - about 3000 files! If you do not want to wait a long time for download - donate a minimum of 15$, enter your email - you will gain full access to the folder with chess engines, games, tables, etc. My email: jotes@go2.pl

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