Stefan Pohl Computer Chess

Latest Website-News (2019/10/18): Testrun finished: Lc0 0.22.0 J13B.2-200. First testrun of a Net, which is bigger then 256x20: A J.Horthos "Terminator"-Net (size: 320x24). Result is a little bit disappointing, because it is -38 Elo weaker, than the best 256x20 Net (T40B.4-160).

I added the new TCEC SuFi openings (Season 16) to my edited J.Noomen TCEC Sufi openings - 267 (of 400) lines, now (all lines longer than 4 plies, all endpositions are unique and all endpositions checked with Komodo (eval-interval of endpostion [-0.50;+0.60] (10 minutes thinking-time on Quadcore))). Download them in the "Downloads & Links"- section or right here

Stay tuned.

Stockfish testing

Playing conditions:

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

Fritzmark: singlethread: 5.3 / 2521 (all engines running on one thread, 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: Since 19/09/11: Cutechess-cli (draw at 250 moves, GUI ends game, when a 5-piece endgame is on the board), before: LittleBlitzerGUI (draw at 170 moves, resign at -700cp)

Tablebases: None for engines, 5 Syzygy for cutechess-cli

Openings: HERT_500 testset (by Thomas Zipproth) (download the file at the "Download & Links"-section or here)

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-Libraries): here

Each Stockfish-version plays 1000 games versus Komodo 13.1, Houdini 6, Fire 7.1, Xiphos 0.5.6, Ethereal 11.53. All engines are running with default-settings.

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-Libraries of course, because otherwise BrainFish = Stockfish.

Latest update: 2019/10/14: Stockfish 191007 (+6 Elo to Stockfish 190930)

(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    : 3586    8    8  5000    80.5 %   3328   36.8 %
   2 Stockfish 191007 bmi2      : 3557    8    8  5000    77.6 %   3331   39.7 %
   3 Stockfish 10 181129        : 3508    5    5 17000    77.6 %   3280   38.9 %
   4 Stockfish 9 180201         : 3458    9    9  5000    74.9 %   3255   41.7 %
   5 Houdini 6 pext             : 3427    3    3 22000    64.9 %   3310   48.4 %
   6 Komodo 13.1 bmi2           : 3409    5    5 10000    60.6 %   3328   49.9 %
   7 Komodo 13.01 bmi2          : 3401    6    6  8000    55.7 %   3359   52.7 %
   8 Komodo 12.3 bmi2           : 3394    6    6  8000    63.2 %   3292   49.8 %
   9 Komodo 13.1 MCTS           : 3313    6    6  9000    50.3 %   3313   52.6 %
  10 Komodo 13.01 MCTS          : 3295    6    6  6000    42.2 %   3355   54.4 %
  11 Fire 7.1 popc              : 3279    4    4 22000    45.6 %   3317   52.6 %
  12 Xiphos 0.5.6 bmi2          : 3275    6    6  7000    34.9 %   3394   49.8 %
  13 Ethereal 11.53 pext        : 3267    5    5 12000    37.7 %   3367   49.6 %
  14 Xiphos 0.5.3 bmi2          : 3265    5    5 12000    37.2 %   3365   51.0 %
  15 Komodo 12.3 MCTS           : 3258    6    6  8000    43.7 %   3309   47.1 %
  16 Ethereal 11.25 pext        : 3249    6    6  9000    38.7 %   3336   51.8 %
  17 rofChade 2.2 bmi2          : 3200    7    7  6000    29.0 %   3367   44.6 %
  18 Laser 1.7 bmi2             : 3200    7    7  6000    30.8 %   3353   45.8 %
  19 Fizbo 2 bmi2               : 3195    8    8  5000    36.0 %   3307   39.0 %
  20 Shredder 13 x64            : 3192    7    7  6000    31.9 %   3341   42.6 %
  21 Defenchess 2.2 popc        : 3187    7    7  6000    27.4 %   3367   42.4 %
  22 Booot 6.3.1 popc           : 3181    8    8  5000    34.0 %   3310   44.1 %
  23 Andscacs 0.95 popc         : 3150    9    9  5000    23.1 %   3373   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).