Stockfish 1.6

[tomgdrums]

Hi all,

here below is the link to the sources+Windows and Linux binaries (courtesy of the wonderful Jim Ablett) of Stockfish 1.6

http://www.mediafire.com/?ij3oonzkmzh

Diff stat from 1.5.1 is:

33 files changed, 1972 insertions(+), 1742 deletions(-)

So this is the first release where there is a net increment of lines of code, we hope they are worth some ELO points more

Many changes, especially in the search and a lot of small stuff scattered around the sources that now have, at last, reached a good code style quality (at least for our taste).

As usual many thanks to all the people that have contributed privately or here on the forum to bug fixes and patches.

Tord has been out of this release cycle due to his personal activities, but we all hope that in the future he will find time to enjoy again this computer chess passion.



Merry Christmas and Happy New Year

Marco Costalba, Joona Kiiski

Hi Marco!


I was wondering if you knew why Stockfish won't insert it's analysis into the game notation in the Shredder 12 GUI. I am talking about analyze game mode. In infinite analysis mode it works great. Stockfish is not the only engine that won't enter the analysis in analyze game mode.

And for clarity I am talking about Stockfish 1.5 as I have not yet tried Stockfish 1.6.

Thanks,

Tom G

[Albert Silver]

Why would anyone need to go to all that trouble? How hard would it be to take Rybka 2.2, for example, and have it identify itself as Rybka 3?

You think ppl are that stupid that cannot see the difference between 7.5MB and 2.5MB file???
Or you think they cannot see the the difference in output?

Oh, I forgot your version must be really good since you got it personally from Vas.
Did you get the autograph too?

You aren't very bright are you? Why would people know the size of the file by heart? Or do you think people go about memorizing the byte size of the engine files, then check this before they run it? As to seeing the difference in the output. I would be fascinated if you could teach me how to recognize the engine used by staring at the output.

[kingliveson]

From hence forward, I would be known as Michel de Nostredame. I hope the mods would consider editing my name to reflect this.


Regards,

Nostredame

[gerold]

Thanks Marco.
Happy holidays to you.
Stockfish 1.6 appears to be the 3rd. strongest free engine at
this time.

It rates each positive move higher than most engines.
It is a tad slower than Robb g3 and Tank.

Best,

Gerold.

[Hart]

Code: Select all

Rank Name                            Elo    +    - games score oppo. draws 
   1 Rybka 3 64-bit 2CPU              84   20   20   600   67%   -27   42% 
   2 RobboLito 0.085e4 x64            71   18   18   720   63%   -12   44% 
   3 Rybka 3 64-bit                   49   20   19   600   62%   -27   46% 
   4 Stockfish 1.6 64-bit            -17   19   19   600   44%    24   44% 
   5 Deep Shredder 12 32-bit OA On   -38   18   18   720   43%     6   40% 
   6 Naum 4 64-bit                   -49   18   18   720   41%     8   44% 
   7 Stockfish 1.5.1 64-bit         -101   20   21   600   31%    24   38% 

Using cutechess-cli with: -resign 3 500 -repeat -draw 120 10 -pgndepth 24
Ponder=false, Threads=1, No table/shredder-bases, Rybka's "Contempt Play"=0
Time control is adjusted to CCRL 40/4.

Test suite and games -> http://www.mediafire.com/?jn2onowyen2


Thanks again for this strong engine with a very interesting style of play! Every chess player who refers to chess engines for analysis should have this in their arsenal.

Merry Christmas!

[michiguel]

Thanks Marco.
Happy holidays to you.
Stockfish 1.6 appears to be the 3rd. strongest free engine at
this time.

It rates each positive move higher than most engines.
It is a tad slower than Robb g3 and Tank.

Best,

Gerold.

According to the recent results from Michael Hart, it looks like it could be #1 in current common hardware (quads), because SF is SMP. Many many more tests are needed, but it is a realistic projection. Congrats to SF team, and Merry Christmas to all.

Miguel

[menniepals]

This Glaurung offspring is very strong. Maybe 50 elo stronger than the previous version.

[mcostalba]

Hi Marco!


I was wondering if you knew why Stockfish won't insert it's analysis into the game notation in the Shredder 12 GUI. I am talking about analyze game mode. In infinite analysis mode it works great. Stockfish is not the only engine that won't enter the analysis in analyze game mode.

And for clarity I am talking about Stockfish 1.5 as I have not yet tried Stockfish 1.6.

Thanks,

Tom G

Hi Tom,

unfortunatly I don't have Shredder GUI so actually I don't think I can help you on this specific question.

Thanks
Marco

[Uri Blass]

Thanks Marco.
Happy holidays to you.
Stockfish 1.6 appears to be the 3rd. strongest free engine at
this time.

It rates each positive move higher than most engines.
It is a tad slower than Robb g3 and Tank.

Best,

Gerold.

What is tank and why 3rd free engine.

I understand that you consider Robbolito as first free engine but which program is second free engine if not stockfish?

Uri

[gerold]

Thanks Marco.
Happy holidays to you.
Stockfish 1.6 appears to be the 3rd. strongest free engine at
this time.

It rates each positive move higher than most engines.
It is a tad slower than Robb g3 and Tank.

Best,

Gerold.

What is tank and why 3rd free engine.

I understand that you consider Robbolito as first free engine but which program is second free engine if not stockfish?

Uri

Rybka 2.2n2mpw32 is still stronger than Stockfish 1.6.
Stockfish may show a move value of 2 in ending of game
when it really is a lost or a draw for Stockfish.The value
of the moves that Stockfish in the whole game seems to
be over valved.
Tank is a brother to Robbo. I don't know if any work has
been done on it lately. It did not have the time problem
that early versions that Robbo had..

Best,

Gerold.