Stefan Pohl Computer Chess

Latest Website-News (2025/07/26): Testrun of Pawnocchio 1.8 finished. -13 Celo missing to enter the UHO-Top15 Ratinglist. So, the result of Pawnocchio 1.8 can only be seen in my full UHO Ratinglist

 

Super 3 Tournament updated.

 

Ceres Binary here, Ceres Installation Guide here, Ceres Nets here

 

Dont forget to take a look at my EAS-Ratinglist (The world's first engine-ratinglist not measuring strength of engines, but engines's style of play).

 

Next testrun: Stockfish 250728 (Testrun of Stockfish 250724 aborted - no progress and the new dev has received some promising functional patches...)

 

Stay tuned

UHO-Top15 Engines Ratinglist (+ regular testing of Stockfish Dev-versions)

 

 

Playing conditions:

 

The 15 strongest engines and the latest StockfishDev version are playing 1000 games vs. each opponent: 15000 games per engine are played. A RoundRobin Tournament with 120000 games overall !

 

Hardware: AMD Ryzen 9 7945HX 16-core (32 threads) notebook with 64GB RAM (since 2024/10/08), 2 identical machines. Windows 11 64bit

Speed: (singlethread, TurboBoost-mode switched off, chess starting position) Stockfish 17: 600 kn/s (when 26 games are running simultaneously)

Hash: 512MB per engine

GUI: Cutechess-cli (GUI ends game, when a 5-piece endgame is on the board, all other games are played until mate or draw by chess-rules (3fold, 50-moves, stalemate))

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

Openings: My UHO_2022_6mvs_+120_+129 openings are used (first 500 lines) (UHO 2022 openings are part of my Anti Draw Openings download-package). 

Ponder, Large Memory Pages & learning: Off

Thinking time: 3min+1sec per game/engine. One testrun (15000 games) takes around 80-85 hours (=3.5 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: 200807 = August, 7, 2020). The used SF compile is the AVX512-compile, which is the fastest on my AMD Ryzen CPU. SF binaries are taken from https://github.com/official-stockfish/Stockfish/releases (except the official SF-release versions, which are taken form the official Stockfish website).

Read the explanation, why I chose my testing-conditions, like I did here

 

Latest update: 2025/07/22: Torch 4 (+21 Celo to Torch 3.1)

 

(Ordo-calculation fixed to Stockfish 17.1 = 3854 Celo. Mention, there are no human or "realistic" Elo numbers in enginechess, since the engines reached superhuman strength, so I decided to use "Celo" (=Computer Elo) instead)

 

 

See the tournament cross-table as a picture (done by Fritz20 GUI) here

See the individual statistics of engine-results here

See the Engines Aggressiveness Score Ratinglist here

See the Gamepair-statistics of the UHO-Top15 Ratinglist here

See the full UHO Ratinglist (with EAS-Ratinglist): here

Download the current gamebase, the full-list gamebase and the archive here

See the old SPCC-Ratinglist (full list) and EAS-List from 2020 until 2023/08/28: here

 

(best Stockfish Celo: Stockfish 250321: 3858 Celo, latest full release (Stockfish 17.1) had 3854 Celo)

(highest EAS-Score since Stockfish 16 release: Stockfish 240519: 203882 EAS-points)

(Read the explanation of the Lc0-entry in the Ratinglist here).

     Program                    Celo    +    - Games    Score   Av.Op. Draws

   1 Stockfish 250629 a512    : 3858    4    4 15000    67.9%   3724   48.5%
   2 Stockfish 17.1 250330    : 3854    4    4 15000    67.3%   3724   48.8%
   3 Torch 4 a512             : 3812    4    4 15000    61.7%   3727   49.4%
   4 Obsidian 250706 a512     : 3792    4    4 15000    58.8%   3728   49.7%
   5 Integral 250708 a512     : 3756    4    4 15000    53.5%   3730   50.4%
   6 PlentyChess 6.02 a512    : 3753    4    4 15000    53.1%   3731   50.2%
 [   Lc0 0.32dev BT4-6077500  : 3753   15   15  1000 (NN vs SF15.1 testing)]
   7 Berserk 250606 a512      : 3745    4    4 15000    52.0%   3731   50.3%
   8 Reckless 250630 bmi2     : 3736    4    4 15000    50.7%   3732   49.1%
   9 Alexandria 8.0 a512      : 3714    4    4 15000    47.4%   3733   50.4%
  10 KomodoDragon 3.3 avx2    : 3695    4    4 15000    44.6%   3734   49.9%
  11 Caissa 1.22 a512         : 3683    4    4 15000    42.9%   3735   50.8%
  12 Viridithas 250712        : 3680    4    4 15000    42.5%   3735   50.3%
  13 Stormphrax 7.0 avx2      : 3676    4    4 15000    42.0%   3736   49.0%
  14 RubiChess 250606 a512    : 3657    4    4 15000    39.2%   3737   50.0%
  15 Horsie 1.1 a512          : 3655    4    4 15000    38.9%   3737   49.0%
  16 Clover 8.2 a512          : 3645    4    4 15000    37.5%   3738   51.3%

Games        : 120000 (finished)
White Wins   : 59182 (49.3%)
Black Wins   : 1029   (0.9%)
Draws        : 59789 (49.8%)

Below the UHO-Top15 Ratinglist, recalculated with Gamepairs (using my Gamepair Rescoring Tool V1.5), Ordo-calculation fixed to Stockfish 17.1 = 3854 Celo, realizing Vondele's (Stockfish Maintainer) idea: "Thinking uniquely in game pairs makes sense with the biased openings used these days. While pentanomial makes  sense it is a bit complicated so we could simplify and score game pairs only (not games) as W-L-D (a traditional score of 2-0, or 1.5-0.5 is just a W)."

Mention, the errorbar here is +/-5.5 Celo (=11 overall Error), compared to +/-4 Celo in the classical ratinglist above (=1.375 wider errorbar here). But the result-gaps are (at least) 2x up to 2.5x bigger (in average), calculating with gamepairs. So, the statistical reliability of the results is much better in the Gamepair-ratinglist, compared to the classical ratinglist...

CFS means Chance For Superiority in percent, calculated by ORDO.

See the head-to-head gamepair-statistics of the UHO-Top15 Ratinglist here

   # PLAYER                   :    Celo  Error   Pairs     W     D     L   (%)  CFS(%)
   1 Stockfish 250629 a512    :    3868     11    7500  5456  1849   195  85.1     100
   2 Stockfish 17.1 250330    :    3854   ----    7500  5324  1951   225  84.0     100
   3 Torch 4 a512             :    3729     10    7500  4134  2629   737  72.6     100
   4 Obsidian 250706 a512     :    3679     10    7500  3618  2840  1042  67.2     100
   5 Integral 250708 a512     :    3593     10    7500  2682  3185  1633  57.0      98
   6 PlentyChess 6.02 a512    :    3585     10    7500  2629  3130  1741  55.9     100
   7 Berserk 250606 a512      :    3568     10    7500  2419  3230  1851  53.8     100
   8 Reckless 250630 bmi2     :    3547     10    7500  2235  3200  2065  51.1     100
   9 Alexandria 8.0 a512      :    3498     10    7500  1730  3263  2507  44.8     100
  10 KomodoDragon 3.3 avx2    :    3459     10    7500  1438  3114  2948  39.9     100
  11 Caissa 1.22 a512         :    3429     10    7500  1177  3066  3257  36.1      82
  12 Viridithas 250712        :    3425     10    7500  1146  3056  3298  35.7     100
  13 Stormphrax 7.0 avx2      :    3412     11    7500  1066  2988  3446  34.1     100
  14 RubiChess 250606 a512    :    3371     10    7500   766  2854  3880  29.2      99
  15 Horsie 1.1 a512          :    3361     10    7500   750  2728  4022  28.2     100
  16 Clover 8.2 a512          :    3334     11    7500   590  2597  4313  25.2     ---

 

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 22840 (= 38.07%) 
--- Number of 1:1 drawn Gamepairs    : 11184 (= 18.64%) 
--- Number of 2-draws drawn Gamepairs: 11656 (= 19.43%) 
------------------------------------------------------------------- 

Aborted testruns, because the tested engine was too weak to enter the UHO-Top15 Ratinglist:

Halogen 13, Renegade 1.2.0, Igel 3.6.0, Minic 3.41, Booot 7.3, Black Marlin 9.0, Equisetum 1.0, Quanticade 2.0, Clarity 8,

Below you find a diagram of the progress of Stockfish in my tests since February 2023. 

And below that diagram, the older diagrams.

 

You can save the diagrams on your PC with mouseclick (right button) and then choose "save image"...