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Clovis III - released.

"Clovis is born again!"

With these words, Mr. Jonathan McDermid announces the release of the latest version of his chess engine.

Source: GitHub

Clovis is a free open source chess engine under the MIT license.

Here are the changes that have taken place in the latest version of Clovis III.


  • implemented gradient descent tuner

  • disabled drawishness and some other evaluation functions until they are integrated into tuner

  • added some params to evaluation (candidate passer, rook on seventh)

  • vertically mirrored some PSQTs


Source: GitHub

Certainly, Clovis III is stronger than its predecessors. Considering that Clovis uses HCE (hand craft eval) and it has only been a little over 1 month since the release of the Clovis I, the 133 Elo difference between Clovis I and Clovis III is not small number.

Source: MCERL (ongoing)

This shows that the author is making an effort and working on his engine!

I think it is worth paying attention to Clovis - an engine that, in my opinion, has great potential. Currently, Clovis does not use a neural network and already plays strong chess. I predict that if in the future Mr. Jonathan McDermid decides to develop Clovis with the possibility of using a neural network, we can look forward to a really strong computer player.

I encourage you to download and use this interesting and regularly developed chess engine.

Linux arm64 & x64 – Compiled by Darius

Download 7Z • 160KB
Download 7Z • 223KB

Mac Apple Silicon & Intel – Compiled by Darius

Download 7Z • 147KB
Download 7Z • 210KB

Windows x32 & x64 – Compiled by Darius

Download 7Z • 687KB
Download 7Z • 947KB

Source Code – by Jonathan McDermid

Download 7Z • 9.92MB


In the Files area you will find free chess engines for download.



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