Atlas 3.80 release

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Posts: 28
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Location: Alcalá de Henares, Madrid (Spain)

Atlas 3.80 release

Post by Manza » Fri Feb 06, 2015 11:38 pm

Hello all,

new version Atlas 3.80 available at

In this version I made a general re-testing, rewriting many parts. A short summary:
- Enable hash qsearch
- Only check extension
- Aspiration: not symmetrical window
- IID improvement
- Bad direct checks in qsearch now pruned
- Bad quiets moves now decreasing heuristic history
- General re-testing parameters in eval function
- Modification of king safety
- Added safe checks in king safety
- Improving mobility: linear to non-linear
- General bug correction: many in eval, ordering, ...

I am now rewriting specific endings code and testing the pondering (not enabled yet, next versions).

My test at fast control shows 30-40 elo gain in self testing, but it could be different at long time controls as usual.


Andrés Manzanares.
If your problem has a solution then...why worry about it? If your problem doesn’t have solution then...why worry about it?

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Graham Banks
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Location: Auckland, NZ

Re: Atlas 3.80 release

Post by Graham Banks » Fri Feb 06, 2015 11:55 pm

Manza wrote:Hello all,

new version Atlas 3.80 available at
Excellent news! :)
My email addresses:
gbanksnz at
gbanksnz at

Frank Quisinsky
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Joined: Wed Nov 18, 2009 6:16 pm
Location: Trier, Germany

Re: Atlas 3.80 release

Post by Frank Quisinsky » Sat Feb 07, 2015 12:11 am

Hi Andres,

yes, good NEWS Graham.
Tested Atlas 3.70em x64 in my Qualification-2014 tourney and have a lot of fun with.

I added the engine update in my ToDo Calendar!

Thanks to the Spanish programmer!

I like computer chess!

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Re: Atlas 3.80 release

Post by cdani » Sat Feb 07, 2015 5:16 am

Felicidades por la nueva versión!
Congratulations on the new version!

Jamal Bubker
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Joined: Mon May 24, 2010 2:32 pm

Re: Atlas 3.80 release

Post by Jamal Bubker » Sun Feb 08, 2015 8:43 pm

Gracias Andres !

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