Stockfish DD: a new official release

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

Moderators: hgm, Harvey Williamson, bob

Forum rules
This textbox is used to restore diagrams posted with the [d] tag before the upgrade.
mcostalba
Posts: 2679
Joined: Sat Jun 14, 2008 7:17 pm

Stockfish DD: a new official release

Post by mcostalba » Fri Nov 29, 2013 10:58 pm

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
-------------------------------------------------------------------------------
C++                            20           2088           1577           5547
C/C++ Header                   21            638            555           1555
make                           1             82             80            417
-------------------------------------------------------------------------------
SUM:                           41           2726           2132           7102
-------------------------------------------------------------------------------

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.

User avatar
Graham Banks
Posts: 31348
Joined: Sun Feb 26, 2006 9:52 am
Location: Auckland, NZ

Re: Stockfish DD: a new official release

Post by Graham Banks » Fri Nov 29, 2013 11:09 pm

mcostalba wrote:This release is dedicated to Don.
Nice thought. :)
My email addresses:
gbanksnz at gmail.com
gbanksnz at yahoo.co.nz

lkaufman
Posts: 3187
Joined: Sun Jan 10, 2010 5:15 am
Location: Maryland USA
Contact:

Re: Stockfish DD: a new official release

Post by lkaufman » Fri Nov 29, 2013 11:31 pm

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.

Vinvin
Posts: 4110
Joined: Thu Mar 09, 2006 8:40 am

Re: Stockfish DD: a new official release

Post by Vinvin » Sat Nov 30, 2013 12:56 am

I would prefer the name entire "Stockfish Don Dailey".

parrish
Posts: 2650
Joined: Fri Mar 17, 2006 5:05 am

Re: Stockfish DD: a new official release

Post by parrish » Sat Nov 30, 2013 1:09 am

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!

Ryan Benitez
Posts: 716
Joined: Thu Mar 09, 2006 12:21 am
Location: Portland Oregon

Re: Stockfish DD: a new official release

Post by Ryan Benitez » Sat Nov 30, 2013 2:05 am

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.

User avatar
Stonewall
Posts: 54
Joined: Sat Jul 06, 2013 3:26 pm
Location: Philippines

Re: Stockfish DD: a new official release

Post by Stonewall » Sat Nov 30, 2013 2:17 am

Congrats Stockfish Team!! Can you estimate the Elo gain over Version 4 ??
Imagination is better than knowledge

User avatar
lucasart
Posts: 2991
Joined: Mon May 31, 2010 11:29 am
Full name: lucasart
Contact:

Re: Stockfish DD: a new official release

Post by lucasart » Sat Nov 30, 2013 2:30 am

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.
Theory and practice sometimes clash. And when that happens, theory loses. Every single time.

pohl4711
Posts: 871
Joined: Sat Sep 03, 2011 5:25 am
Location: Berlin, Germany
Contact:

Re: Stockfish DD: a new official release

Post by pohl4711 » Sat Nov 30, 2013 5:11 am

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

carldaman
Posts: 1575
Joined: Sat Jun 02, 2012 12:13 am

Re: Stockfish DD: a new official release

Post by carldaman » Sat Nov 30, 2013 7:00 am

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

Post Reply