Critter 1.6 released!

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Karol Majewski
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Critter 1.6 released!

Post by Karol Majewski » Fri Jun 15, 2012 7:45 am

Good news! Thanks Richard.

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Full name: Vincent Lejeune

Re: Critter 1.6 released!

Post by Vinvin » Fri Jun 15, 2012 7:53 am

How much stronger ?

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Re: Critter 1.6 released!

Post by rvida » Fri Jun 15, 2012 7:54 am

Recent changes/additions:

- Automatic detection of SEE4.1 capable CPU. Both SSE4/non-SSE4 codepaths are now compiled in a single executable and chosen dynamically at runtime.

- Large pages suppport. This requires sufficient user privileges and right OS settings.

- Own book is automatically turned off when analysing.

- Engine now honors multi-pv even when the root position is a tablebase hit

- Session file now supports IDEA. SF writes are disabled at root when any moves were excluded.

- Session file writes are now protected by OS IPC mechanisms (semaphores/mutexes). Same session file can be accessed concurrenlty by multiple engine isntances without risking corruption (useful when running IDEA)

- Removed UCI option "SF strategy", now its value is hardwired to "depth"

- New UCI option "SF move limit" which disables learning after game has reached given number of moves. When set to 0 this option is ignored.

- New UCI option "SF material limit" (0..32). Disables learning when total amount of material is less than the given amount [Q=6, R=3, B&N=1]. When set to 0 this option is ignored.

- Gameplay related changes:
* Tweaked blocked-pawn recognizer
* Skewer detection in eval
* King safety tweaks
* Pseudo-contempt: slightly increased preference of moves increasing pressure on the opponents king
* slightly increased preference of pawn pushes in semi-blocked positions
* Recognizing more types of drawish endgames

- new console mode commands "sf probe", "sf delete", "sf store" for mainpulating session file entries


Bram Visser
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Re: Critter 1.6 released!

Post by Bram Visser » Fri Jun 15, 2012 7:58 am

Great news ! :D

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Re: Critter 1.6 released!

Post by stevenaaus » Fri Jun 15, 2012 8:11 am

Code: Select all

critter-16: /lib64/ version `GLIBC_2.14' not found

Fedora 14 is less than two years old.

I'm not a guru about glibc versions, but compiling closed source stuff on an older box is a nice courtesy... Or perhaps this page is useful ... not-found/


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Graham Banks
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Re: Critter 1.6 released!

Post by Graham Banks » Fri Jun 15, 2012 8:43 am

Thanks Richard. :)
gbanksnz at

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Matthias Gemuh
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Re: Critter 1.6 released!

Post by Matthias Gemuh » Fri Jun 15, 2012 8:59 am

Thanks !
My engine was quite strong till I added knowledge to it.

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Dr.Wael Deeb
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Re: Critter 1.6 released!

Post by Dr.Wael Deeb » Fri Jun 15, 2012 9:01 am

Thanks Richard :D
_No one can hit as hard as life.But it ain’t about how hard you can hit.It’s about how hard you can get hit and keep moving forward.How much you can take and keep moving forward….

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Marek Soszynski
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Re: Critter 1.6 released!

Post by Marek Soszynski » Fri Jun 15, 2012 9:04 am

Running the 64-bit Linux compile in Scid causes termination when tablebases are accessed.

I don't know if this is the same problem that affected the previous Critter: ... 05894.html
Marek Soszynski

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Re: Critter 1.6 released!

Post by Strelkaman » Fri Jun 15, 2012 9:29 am

Critter 1.6 is a true masterpiece.Thanks Richard
Strelka is the best engine in the world!!

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