Stefan Pohl Computer Chess

Latest Website-News (2019/08/20): Testrun of Lc0 0.22.0 Net 11260 (final Net of 10xxx learning, measure the progress between the Net-generations) finished. Checkout the results and download the games in the "Lc0 / NN testing"- section. Next NN-testrun: ScorpioNN 3.0 n_maddex_INT8 (I followed the installation-guide by the author - the engine seems to run in the LittleBlitzerGUI - fingers crossed...)

Testrun of Stockfish 190814 still running - when it is finished, next testrun will be Komodo 13.1.

Armageddon Openings released. No more any draws or draw-death in Computerchess !!! 

Base idea by Larry Kaufman, developed by Stefan Pohl.

12 different opening-sets, Books for Fritz, Arena and Polylgot. 10000 testgames played (and included in the download-package)...

Check the "Armageddon Openings"- section for further information and download the Armageddon Openings right 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 160 moves, resign at -700cp (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 engines are the date of the latest patch, which was included in the Stockfish sourcecode, not the release-date of the engine-file, written backwards (year,month,day))(example: 170526 = May, 26, 2017). Since July, 2018 I use the abrok-compiles of Stockfish again (http://abrok.eu/stockfish), because they are now much faster than before - now only 1.3% slower than BrainFish-compiles. So, there is no reason anymore to not use these "official" development-compiles.

Download BrainFish (and the Cerebellum-Library): here

Each Stockfish-version plays 1000 games versus Komodo 13.01, Houdini 6, Fire 7.1, Xiphos 0.5.3, Ethereal 11.53. 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: 2019/08/12: BrainFish-2 190726 (+51 Elo to Stockfish 190726)

(Ordo-calculation fixed to Stockfish 10 = 3508 Elo)

See the individual statistics of engine-results here

See the ORDO-rating of the archive-gamebase since 2019 here

Download the current gamebase here

Download the archive-gamebase since 2019 here

     Program                      Elo    +    -   Games   Score   Av.Op.  Draws

   1 BrainFish-2 190726 bmi2    : 3589    9    9  5000    80.5 %   3331   36.8 %
   2 Stockfish 190726 bmi2      : 3538    8    8  5000    75.8 %   3331   43.4 %
   3 Stockfish 10 181129        : 3508    5    5 12000    77.2 %   3284   39.5 %
   4 Stockfish 9 180201         : 3461    8    8  5000    74.9 %   3258   41.7 %
   5 Houdini 6 pext             : 3431    4    4 17000    63.9 %   3321   48.5 %
   6 Komodo 13.01 bmi2          : 3402    6    6  9000    52.9 %   3382   52.5 %
   7 Komodo 12.3 bmi2           : 3396    6    6  8000    63.2 %   3295   49.8 %
   8 Komodo 13.01 MCTS          : 3297    6    6  6000    42.2 %   3357   54.4 %
   9 Fire 7.1 popc              : 3282    4    4 17000    44.3 %   3330   51.8 %
  10 Ethereal 11.53 pext        : 3271    7    7  7000    30.3 %   3431   45.7 %
  11 Xiphos 0.5.3 bmi2          : 3269    5    5 11000    35.7 %   3384   49.6 %
  12 Komodo 12.3 MCTS           : 3261    6    6  8000    43.7 %   3312   47.1 %
  13 Ethereal 11.25 pext        : 3252    5    5  9000    38.7 %   3339   51.8 %
  14 Laser 1.7 bmi2             : 3202    7    7  6000    30.8 %   3355   45.8 %
  15 Fizbo 2 bmi2               : 3198    8    8  5000    36.0 %   3311   39.0 %
  16 Shredder 13 x64            : 3195    7    7  6000    31.9 %   3344   42.6 %
  17 Booot 6.3.1 popc           : 3185    8    8  5000    34.0 %   3313   44.1 %
  18 Andscacs 0.95 popc         : 3152    8    8  5000    23.1 %   3376   35.4 %

The version-numbers (180622 for example) of the engines are the date of the latest patch, which was included in the Stockfish sourcecode, not the release-date of the engine-file. Especially the asmFish-engines are often released much later!!

Below you find a diagram of the progress of Stockfish in my tests since the end of 2018. 

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).