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Stockfish DD: a new official release
Posted: Fri Nov 29, 2013 11:58 pm
by mcostalba
This is a new release of Stockfish after the last TCEC season. It is almost the same version that played the superfinal against Komodo. You can download at
http://stockfishchess.org/ or browse the sources at
https://github.com/mcostalba/Stockfish . If you still don’t find the release package
please wait few hours while our site is being updated. For people compiling themselves, please verify signature is correct running ‘stockfish bench’ from a terminal window. At the end of the run, searched nodes shall be 8596156
Diffs from last version is:
32 files changed, 966 insertions(+), 1257 deletions(-)
So 291 lines of code less but should be quite stronger than version 4. For interested people here is the breakdown of lines count.
Code: Select all
-------------------------------------------------------------------------------
Language files blank comment code
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C++ 20 2088 1577 5547
C/C++ Header 21 638 555 1555
make 1 82 80 417
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SUM: 41 2726 2132 7102
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And here is the list of developers that contributed to this release:
Code: Select all
Chris Caino
Eelco de Groot
Gary Linscott
Gregor Cramer
Hongzhi Cheng
Jean-Francois Romang
Joona Kiiski
Jörg Oster
Kelly Wilson
Kojirion
Lucas Braesch
Marco Costalba
Matthew Sullivan
Ralph Stößer
Raminder Singh
Reuven Peleg
Uri Blass
A special thank to Daylen Yang, our precious webmaster and builder of the Mac binaries and to
http://abrok.eu/stockfish/ from which I have, shameless, took the Windows binaries.
This release is dedicated to Don.
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 12:09 am
by Graham Banks
mcostalba wrote:This release is dedicated to Don.
Nice thought.
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 12:31 am
by lkaufman
Graham Banks wrote:mcostalba wrote:This release is dedicated to Don.
Nice thought.
Naming it DD was indeed a very thoughtful tribute to Don. We can't very well do the same with the next Komodo since every version until now has been a DD version. For the record, I would say that Don was the primary author thru version 1133 which played stage 4 of TCEC, while any changes since then are the fruit (yes, pun intended) of my collaboration with Mark Leffler. I would also like to say that if Don could list the engines that have had the greatest influence on the development of Komodo, Stockfish would rank as number 1.
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 1:56 am
by Vinvin
I would prefer the name entire "Stockfish Don Dailey".
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 2:09 am
by parrish
Nice! I was somewhat disappointed with Stockfish 4, which I found to play weaker than Stockfish 3 in some situations. Stockfish DD is definitely a huge improvement!
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 3:05 am
by Ryan Benitez
Stockfish is an amazing project in that it is possibly the worlds strongest chess engine and there is almost nothing to learn from the source code. Everything it does was well known to programmers in 2005 but Stockfish put together a great test method and implemented the existing ideas in a more consistent and probably better tuned way. Another great part of Stockfish is that it shows that eventually the GPL wins over the Clone Groups (TM). Don beating the clones as well is a pleasant surprise and a testament to his skill. It is sad that Don is no longer with us, he and Stockfish are the primary reasons that computer chess has recently become interesting again for the first time since about 2005.
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 3:17 am
by Stonewall
Congrats Stockfish Team!! Can you estimate the Elo gain over Version 4 ??
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 3:30 am
by lucasart
Stonewall wrote:Congrats Stockfish Team!! Can you estimate the Elo gain over Version 4 ??
About +65 elo. Note that this estimation is based on: self-play against SF 4, 1 thread, tc=1'+0.05" for a benchmark machine at 1.6Mnps.
How this +65 elo will translate in rating list condition, with unrelated engines and at longer time control, with increment, or at tournament time control, is (as always) an open question.
+50 elo in rating lists would be really nice! Would bridge half the 100 elo gap between Stockfish 4 and Houdini 4 in CEGT 5'+3" for example.
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 6:11 am
by pohl4711
Stonewall wrote:Congrats Stockfish Team!! Can you estimate the Elo gain over Version 4 ??
The test of Stockfish DD for umy LS-ratinglist will start tomorrow and should end on Thursday morning.
Then we will know the Elo gain.
Stefan
Re: Stockfish DD: a new official release
Posted: Sat Nov 30, 2013 8:00 am
by carldaman
parrish wrote:Nice! I was somewhat disappointed with Stockfish 4, which I found to play weaker than Stockfish 3 in some situations. Stockfish DD is definitely a huge improvement!
I had been critical of the way Stockfish 4 played in closed positions, but changes applied in a few short months show a distinct and remarkable improvement (even) in this area. I would like to post a few interesting test games later on when I have time.
Regards,
CL