Stockfish 5

Discussion of anything and everything relating to chess playing software and machines.

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Leto
Posts: 2028
Joined: Thu May 04, 2006 1:40 am
Location: Dune

Re: Stockfish 5

Post by Leto » Sat May 31, 2014 1:12 pm

Leto wrote:All new executables do that. Normally the antivirus software just analyses it for a while when it's the first time it's seen that file and then if it doesn't find anything malicious it lets you use the executable. That's what Avast Deepscreen does and did. Nothing malicious found.

Stockfish speeds on my i3 4 core laptop on start position after 30 seconds of infinite analysis:
May 19 2014 standard dev release : 2671kn/s depth 24
Stockfish 5 standard release: 2633kn/s depth 24
Stockfish 5 modern release: 2637kn/s depth 23

Looking good, will beging testing immediately for CEGT 40/4, estimate date for CEGT 40/4 update will be June 7-10. Thanks for the release and congratulations.
Actually that laptop is 2 cores with 4 threads (two threads are HT, so not same benefit as having 4 cores.

A doubling of cores should give you about 1.9 speedup. On 1 thread I get about 1059kn/s for the SSE4.2 version. On 2 threads I get 1972kn/s which is close to 1.9. On 4 threads 2637kn/s so only getting 1.34 speedup, on a real 4 core machine i could expect somewhere around 3746kn/s.

Tomcass
Posts: 786
Joined: Sun Apr 16, 2006 7:09 pm

Re: Stockfish 5

Post by Tomcass » Sat May 31, 2014 1:23 pm

Thank you very much for this great gift, Marco and Stockfish Team!.

I will start right now my double test -960 games- of this engine. I will post the results in about three days. :-)

Smiling regards from Barcelona,

Tom.

Lion
Posts: 509
Joined: Fri Mar 31, 2006 11:26 am
Location: Switzerland

Re: Stockfish 5

Post by Lion » Sat May 31, 2014 1:48 pm

Thank you.
I think Stockfish iOS is using engine version 4, so that will be a huge jump ! 8-)

Tord Romstad
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Joined: Wed Mar 08, 2006 8:19 pm
Location: Oslo, Norway

Re: Stockfish 5

Post by Tord Romstad » Sat May 31, 2014 2:09 pm

Lion wrote:Thank you.
I think Stockfish iOS is using engine version 4, so that will be a huge jump ! 8-)
No, it's newer than SF 4, though slightly older than SF DD.

syzygy
Posts: 4376
Joined: Tue Feb 28, 2012 10:56 pm

Re: Stockfish 5

Post by syzygy » Sat May 31, 2014 2:32 pm

SzG wrote:
mcostalba wrote:Yes it is, but without Syzygy Bases.
I may have missed something but why has the syzygy code been removed?
It has never been part of the official source tree.

ZirconiumX
Posts: 1327
Joined: Sun Jul 17, 2011 9:14 am

Re: Stockfish 5

Post by ZirconiumX » Sat May 31, 2014 3:58 pm

SzG wrote:
syzygy wrote:
SzG wrote:
mcostalba wrote:Yes it is, but without Syzygy Bases.
I may have missed something but why has the syzygy code been removed?
It has never been part of the official source tree.
It was in the version which played in TCEC. So it was not the official version but your private one that played. Congratulations to your win.
Anyway, I can't see why it is not in the official branch. Or why the two are not merged.
Marco wants to keep the source tree clean of TBs.

Matthew:out
Some believe in the almighty dollar.

I believe in the almighty printf statement.

Andre
Posts: 93
Joined: Thu Jul 23, 2009 3:40 am

Re: Stockfish 5

Post by Andre » Sat May 31, 2014 4:15 pm

Any chance we can have a Mac compile with syzygy?

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Thomas Lagershausen
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Re: Stockfish 5

Post by Thomas Lagershausen » Sat May 31, 2014 4:40 pm

Sorry for my wrong comment.

Now i noticed that in my Arena 3.5 gui, under options, the feature "use intern name" was set on fault.

Everything is fine with Stockfish 5

It is a marvelous piece of chessprogramming.
TL

carldaman
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Joined: Sat Jun 02, 2012 12:13 am

Re: Stockfish 5

Post by carldaman » Sat May 31, 2014 4:50 pm

Thank you, Marco & Co. :D

tttony
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Re: Stockfish 5

Post by tttony » Sat May 31, 2014 5:51 pm

Excellent, the new king is here!!!

A curious thing, is that the file size of the stockfish_14053109_x64_modern.exe is exactly: 1.024.000 bytes (1MB)

And why is not Stockfish 5?

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