Stefan Pohl Computer Chess

private website for chessengine-tests


Latest Website-News (2018/02/19): Testrun of Stockfish 180209 finished. Nice progress: +8 Elo to Stockfish 9

 

The long thinking-time tournament is suspended, because I need the PC for some other things.

 

My new SALC V5 openings and books are ready for download. Check out the "SALC openings"-section on this website for further information. Download SALC V5.02 here

 

Stay tuned.


Stockfish testing

 

Playing conditions:

 

Hardware: i7-6700HQ 2.6GHz Notebook (Skylake CPU), Windows 10 64bit, 8GB RAM

Fritzmark: singlecore: 5.3 / 2521 (all engines running on one core, only), average meganodes/s displayed by LittleBlitzerGUI: Houdini: 2.6 mn/s, Stockfish: 2.2 mn/s, Komodo: 2.0 mn/s

Hash: 512MB per engine

GUI: LittleBlitzerGUI (draw at 130 moves, resign at 400cp (for 4 moves))

Tablebases: None

Openings: HERT testset (by Thomas Zipproth) (download the file at the "Download & Links"-section or here)(I use a version of HERT, where the positions in the file are ordered in a different way - makes no difference for testing-results, dont be confused, when you download my gamebase-file and the game-sequence doesnt match with the sequence of your HERT-set...)

Ponder, Large Memory Pages & learning: Off

Thinking time: 180''+1000ms (= 3'+1'') per game/engine (average game-duration: around  7.5 minutes). One 5000 games-testrun takes about 7 days.The version-numbers of the Stockfish-development engines are the release-date, written backwards (year,month,day))(example: 170526 = May, 26, 2017). I use BrainFish-compiles (bmi2) by Thomas Zipproth (without using the Cerebellum-Library, BrainFish is identical to Stockfish and BrainFish-compiles are the fastest compiles of the Stockfish C++ code at the moment, around +10% faster than the abrok.eu-compiles and around 4% faster than the ultimaiq-compiles).

Download BrainFish (and the Cerebellum-Library): here

 

Each Stockfish-version plays 1000 games versus Komodo 11.2.2, Houdini 6, Fire 6.1, Shredder 13, Fizbo 2. All engines are running with default-settings, except: Move Overhead is set to 300ms, if an engine allows to do so.

To avoid distortions in the Ordo Elo-calculation, from now, only 2x Stockfish (latest official release + the latest version) and 1x asmFish and 1x Brainfish are stored in the gamebase (all older engine-versions games will be deleted, every time, when a new version was tested). Stockfish, asmFish and BrainFish older Elo-results can still be seen in the Elo-diagrams below. BrainFish plays always with the latest Cerebellum-Library of course, because otherwise BrainFish = Stockfish.

 

Latest update: 2018/02/19: Stockfish 180209

 

(Ordo-calculation fixed to Stockfish 9 = 3450 Elo)

 

See the individual statistics of engine-results here

Download the current gamebase here

Download the archive (all played games with HERT (130000 games)) here

See a ORDO-rating of the complete HERT-archive-base here

 

     Program                    Elo    +    -   Games   Score   Av.Op.  Draws

   1 BrainFish 180113 bmi2    : 3491    8    8  5000    75.1 %   3283   43.8 %
   2 asmBrainFish 171107      : 3491    8    8  5000    75.5 %   3277   43.5 %
   3 Stockfish 180209 bmi2    : 3458    7    7  5000    71.7 %   3283   45.0 % (new)
   4 Stockfish 9 180201       : 3450    7    7  5000    70.8 %   3283   46.0 %
   5 asmFish 171119 bmi2      : 3440    7    7  5000    70.3 %   3277   48.3 %
   6 Houdini 6 pext           : 3425    5    5 10000    59.1 %   3349   53.5 %
   7 Komodo 11.2.2 x64        : 3383    5    5 10000    53.4 %   3354   52.1 %
   8 Fire 6.1 popc            : 3213    5    5 10000    30.7 %   3370   40.8 %
   9 Fizbo 2 bmi2             : 3202    6    6  7000    28.9 %   3373   35.8 %
  10 Shredder 13 x64          : 3195    5    5 10000    28.5 %   3372   39.5 %
  11 Fizbo 1.9 bmi2           : 3171    7    7  6000    27.4 %   3358   36.1 %

 

The 4 different Fishes in this Elo-list:

 

- Stockfish

- asmFish = Stockfish manually rewritten in assembler (look here)

- BrainFish = Stockfish playing with Cerebellum-Library by Thomas Zipproth (look here)

- asmBrainFish = asmFish playing with Cerebellum-Library

Below you find a diagram of the progress of Stockfish in my tests since the end of 2016

And below that diagram, the older diagrams.

 

You can save the diagrams (as a JPG-picture (in originial size)) on your PC with mouseclick (right button) and then choose "save image"...

The Elo-ratings of older Stockfish dev-versions in the Ordo-calculation can be a little different to the Elo-"dots" in the diagram, because the results/games of new Stockfish dev-versions - when getting part of the Ordo-calculation - can change the Elo-ratings of the opponent engines and that can change the Elo-ratings of older Stockfish dev-versions (in the Ordo-calculation / ratinglist, but not in the diagram, where all Elo-"dots" are the rating of one Stockfish dev-version at the moment, when the testrun of that Stockfish dev-version was finished).


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