Marvin 3.4.0

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Posts: 21
Joined: Sun Jul 10, 2016 7:12 pm
Location: Lund, Sweden
Full name: Martin Danielsson

Marvin 3.4.0

Post by Martin » Tue Jul 09, 2019 1:29 pm

I have just released Marvin 3.4.0. My tests show a 100 elo improvement compared to version 3.3.2, but that's probably a bit optimistic. Most of the improvements comes from more aggressive LMP and improvements to history heuristic. I have also done some refactoring of the move generation and move selection code. It didn't give that much in terms of elo, but the code is a lot cleaner.

Note that the opening book has been updated, so if you're running tests with the engines own book then make sure to update book.bin. Also thanks to Elorejano for reporting some issues with reading of the opening book. Hopefully they should all be fixed.

Binaries: ... tag/v3.4.0

Sergio Martinez
Posts: 1928
Joined: Fri Oct 05, 2012 12:35 pm
Location: Spain

Re: Marvin 3.4.0

Post by Sergio Martinez » Tue Jul 09, 2019 1:49 pm

Thank you very much for this new version Martin

Wow, 100 elo. I´m going to start a gauntlet :)
Member of the CCRL Group. Write me if you want I test your engine.

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Graham Banks
Posts: 33738
Joined: Sun Feb 26, 2006 9:52 am
Location: Auckland, NZ

Re: Marvin 3.4.0

Post by Graham Banks » Tue Jul 09, 2019 10:47 pm

Thanks Martin. Nice improvement! :)
My email addresses:
gbanksnz at
gbanksnz at

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