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Critter goes SMP (version 0.60 is released)
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Richard Vida



Joined: 16 Apr 2009
Posts: 481
Location: Slovakia, EU

PostPosted: Tue Apr 13, 2010 2:13 am    Post subject: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

The first SMP version of Critter is available:

http://www.mediafire.com/?jgydzytfyro

Main changes:

* SMP support (max 8 threads). If hyperthreading is turned on, please set number of threads to number of physical cores.
* Support of "searchmoves" UCI option (useful for IDEA)
* Decreased middlegame pawn value, but much larger passed pawn bonuses
* Added some endgame heuristics (KRPKR, KQKP, opposite colored bishop endings)
* Somewhat slower NPS, but faster time-to-depth

My own single thread testing against Critter 0.52b shows 42 ELO improvement (with error margins +-7). I don't have a precise figure about performance vs. other engines.

Enjoy,

Richard
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Graham Banks



Joined: 26 Feb 2006
Posts: 30137
Location: Auckland, NZ

PostPosted: Tue Apr 13, 2010 2:26 am    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

Thanks Richard. Very Happy
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Zagalo Martini



Joined: 12 Jan 2010
Posts: 102

PostPosted: Tue Apr 13, 2010 2:32 am    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

Thanks, looks good. Any JA compile ?

Dont forget to 'get ideas from Robbo code' to get a big boost as stockfish 1.7 Wink
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Peter C



Joined: 05 Dec 2009
Posts: 660
Location: Colorado, USA

PostPosted: Tue Apr 13, 2010 2:34 am    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

rvida wrote:
The first SMP version of Critter is available:

http://www.mediafire.com/?jgydzytfyro

Main changes:

* SMP support (max 8 threads). If hyperthreading is turned on, please set number of threads to number of physical cores.
* Support of "searchmoves" UCI option (useful for IDEA)
* Decreased middlegame pawn value, but much larger passed pawn bonuses
* Added some endgame heuristics (KRPKR, KQKP, opposite colored bishop endings)
* Somewhat slower NPS, but faster time-to-depth

My own single thread testing against Critter 0.52b shows 42 ELO improvement (with error margins +-7). I don't have a precise figure about performance vs. other engines.

Enjoy,

Richard


HOORAY!

Seriously, I've been waiting an MP release since like 0.42 or something.


Protector 1.3.4 JA 64-bit,
Crafty 23.2 JA 64-bit,
Scorpio 2.5 JA 64-bit,
and bright-0.5c will likely be its first opponents. Maybe some version of Toga also.

Congratulations,
Peter
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Graham Banks



Joined: 26 Feb 2006
Posts: 30137
Location: Auckland, NZ

PostPosted: Tue Apr 13, 2010 2:46 am    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

alpha123 wrote:

Protector 1.3.4 JA 64-bit,
Crafty 23.2 JA 64-bit,
Scorpio 2.5 JA 64-bit,
and bright-0.5c will likely be its first opponents. Maybe some version of Toga also


Sounds like a sensible selection of opponents.
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Peter C



Joined: 05 Dec 2009
Posts: 660
Location: Colorado, USA

PostPosted: Tue Apr 13, 2010 3:11 am    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

Graham Banks wrote:
alpha123 wrote:

Protector 1.3.4 JA 64-bit,
Crafty 23.2 JA 64-bit,
Scorpio 2.5 JA 64-bit,
and bright-0.5c will likely be its first opponents. Maybe some version of Toga also


Sounds like a sensible selection of opponents.


Thanks. The CCRL list helped Smile. It's kinda tough to find some decent amateur SMP engines, so I might through in a stronger engine (Thinker, spark, or Shredder probably) on a single core.

Peter
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Mincho Georgiev



Joined: 04 Apr 2009
Posts: 454
Location: Bulgaria

PostPosted: Tue Apr 13, 2010 6:12 am    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

I'm sure this one is going to jump in CCRL's top 10 on 4 cores. And sorry if it's an underestimation.
Nicely done!
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Horacio Montenegro



Joined: 03 Sep 2008
Posts: 38

PostPosted: Tue Apr 13, 2010 1:33 pm    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

Any plans for a linux compile? I - and I bet many more people here - would love a linux version. (Or maybe the source...)

Anyway, thanks for the engine.
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Marc Halstern



Joined: 18 Nov 2009
Posts: 484

PostPosted: Tue Apr 13, 2010 6:35 pm    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

I've been waiting for this.

I'm going to run a Gauntlet on my 4.0 GHZ I7-920. Look for the crostable and a link to the games on the "Computer Chess Club: Tournaments and Matches" forum, sometime before the weekend.
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Martin Thoresen



Joined: 21 Jun 2006
Posts: 1833

PostPosted: Tue Apr 13, 2010 7:15 pm    Post subject: Re: Critter goes SMP (version 0.60 is released) Reply to topic Reply with quote

Hello Richard!

Looking forward to test your engine.

Here's your new beauty in action:

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