Stefan Pohl Computer Chess

Latest Website-News (2020/04/06): AB-testrun of Stockfish 200329 finished - no progress. Next AB-testrun: BrainFish-2 200329 (using the latest 2 Cerebellums (Release 6 & 177 from 200324)).

NN-testrun of Lc0 0.24.1 Leelenstein 14.1 still running.

Stay tuned. And please stay at home, if possible. Fight Covid-19 and #FlattenTheCurve

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 (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 13.3, Houdini 6, Fire 7.1, Xiphos 0.6, Ethereal 12.00. 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: 2020/03/22: Stockfish 200329 (+1 Elo to Stockfish 200314)

(Ordo-calculation fixed to Stockfish 11 = 3554 Elo)

See the individual statistics of engine-results here

See the ORDO-rating of the archive-gamebase since 2020 here

Download the current gamebase here

Download the archive-gamebase since 2020 here

     Program                    Elo    +    -   Games   Score   Av.Op.  Draws

   1 BrainFish-2 11 bmi2      : 3603    9    9  5000    81.4 %   3337   35.7 %
   2 Stockfish 200215 bmi2    : 3564    8    8  5000    77.9 %   3337   40.4 %
   3 Stockfish 200329 bmi2    : 3563    9    9  5000    77.4 %   3340   40.9 %
   4 Stockfish 200314 bmi2    : 3562    8    8  5000    77.4 %   3340   41.8 %
   5 Stockfish 11 200118      : 3554    7    7  8000    77.7 %   3328   40.6 %
   6 Stockfish 10 181129      : 3507    5    5 17000    78.8 %   3267   37.3 %
   7 Stockfish 9 180201       : 3456    8    8  5000    74.9 %   3253   41.7 %
   8 Houdini 6 pext           : 3424    3    3 28000    61.8 %   3330   47.9 %
   9 Komodo 13.3 bmi2         : 3418    6    6  8000    51.6 %   3406   52.4 %
  10 Komodo 13.1 bmi2         : 3407    4    4 15000    58.3 %   3343   48.5 %
  11 Komodo 12.3 bmi2         : 3393    7    7  7000    62.7 %   3295   49.4 %
  12 Komodo 13.2 MCTS         : 3313    7    7  6000    44.1 %   3358   54.2 %
  13 Ethereal 12.00 pext      : 3295    7    7  7000    32.0 %   3440   43.2 %
  14 Ethereal 11.75 pext      : 3291    5    5 11000    35.2 %   3412   49.4 %
  15 Xiphos 0.6 bmi2          : 3284    5    5 13000    31.3 %   3438   46.8 %
  16 Fire 7.1 popc            : 3279    3    3 28000    43.5 %   3335   50.7 %
  17 Xiphos 0.5.6 bmi2        : 3269    6    6  8000    41.5 %   3334   54.7 %
  18 Ethereal 11.53 pext      : 3262    6    6  9000    44.2 %   3308   53.7 %
  19 Komodo 12.3 MCTS         : 3257    7    7  7000    42.7 %   3315   46.3 %
  20 Ethereal 11.25 pext      : 3252    7    7  6000    38.4 %   3343   51.0 %
  21 Schooner 2.2 popc        : 3224    7    7  6000    31.3 %   3373   50.3 %
  22 Laser 1.7 bmi2           : 3199    7    7  6000    30.8 %   3352   45.8 %
  23 rofChade 2.2 bmi2        : 3198    8    8  5000    27.8 %   3376   43.9 %
  24 Fizbo 2 bmi2             : 3194    8    8  5000    36.0 %   3306   39.0 %
  25 Fritz 17                 : 3193    7    7  6000    29.4 %   3358   44.2 %
  26 Shredder 13 x64          : 3190    7    7  6000    31.9 %   3340   42.6 %
  27 Defenchess 2.2 popc      : 3186    8    8  5000    26.6 %   3376   41.8 %
  28 Booot 6.3.1 popc         : 3180    8    8  5000    34.0 %   3308   44.1 %
  29 Andscacs 0.95 popc       : 3148    8    8  5000    23.1 %   3372   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).