Stefan Pohl Computer Chess

Home of famous UHO openings and EAS Ratinglist


Latest Website-News (2025/10/05): Testrun of Stockfish 250928 finished: No progress to Stockfish 250902.

 

Download Patricia xtremeEAS (avx2 windows binary, only!) here

I released the new V6.0 of my EAS-Tool, download here.

 

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 251005

 

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

OpeningsMy 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: 2025/10/05: Stockfish 250928 (0 Celo to Stockfish 250902)

 

(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 250802: 3859 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 250928 a512     : 3857    4    4 15000    66.9%   3730   48.9%
   2 Stockfish 17.1 250330     : 3854    4    4 15000    66.5%   3730   48.6%
   3 Torch 4 a512              : 3808    4    4 15000    60.2%   3733   49.7%
   4 Obsidian 250706 a512      : 3786    4    4 15000    57.1%   3735   49.8%
   5 Reckless 0.8.0 a512       : 3777    4    4 15000    55.7%   3736   49.7%
   6 PlentyChess 7.0.0 a512    : 3776    4    4 15000    55.6%   3736   49.4%
   7 Integral 250805 a512      : 3756    4    4 15000    52.7%   3737   50.2%
  [   Lc0 0.32dev BT4-6077500  : 3753   15   15  1000 (NN vs SF15.1 testing)] 
   8 Berserk 250606 a512       : 3737    4    4 15000    49.9%   3738   50.4%
   9 Alexandria 8.1 a512       : 3724    4    4 15000    48.0%   3739   50.4%
  10 Clover 9.1 a512           : 3693    4    4 15000    43.5%   3741   50.4%
  11 Caissa 1.23 a512          : 3692    4    4 15000    43.3%   3741   50.3%
  12 Viridithas 18.0 a512      : 3690    4    4 15000    43.0%   3741   49.1%
  13 KomodoDragon 3.3 avx2     : 3688    4    4 15000    42.8%   3741   50.2%
  14 Stormphrax 7.0 avx2       : 3670    4    4 15000    40.1%   3743   48.6%
  15 Horsie 1.1 a512           : 3651    4    4 15000    37.4%   3744   49.2%
  16 RubiChess 250606 a512     : 3650    4    4 15000    37.3%   3744   49.3%

 

Games        : 120000 (finished)
White Wins   : 59425 (49.5%)
Black Wins   : 1010   (0.8%)
Draws        : 59565 (49.6%)


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 250928 a512     :    3862     11    7500  5218  2041   241  83.2      94
   2 Stockfish 17.1 250330     :    3854   ----    7500  5133  2106   261  82.5     100
   3 Torch 4 a512              :    3723     10    7500  3825  2799   876  69.7     100
   4 Obsidian 250706 a512      :    3674     10    7500  3259  3071  1170  63.9     100
   5 Reckless 0.8.0 a512       :    3651     10    7500  2986  3193  1321  61.1      60
   6 PlentyChess 7.0.0 a512    :    3650     10    7500  3012  3120  1368  61.0     100
   7 Integral 250805 a512      :    3605     10    7500  2554  3190  1756  55.3     100
   8 Berserk 250606 a512       :    3560     10    7500  2057  3323  2120  49.6     100
   9 Alexandria 8.1 a512       :    3531     10    7500  1811  3259  2430  45.9     100
  10 Clover 9.1 a512           :    3462     10    7500  1228  3105  3167  37.1      70
  11 Caissa 1.23 a512          :    3460     10    7500  1180  3156  3164  36.8      73
  12 Viridithas 18.0 a512      :    3457     10    7500  1181  3106  3213  36.5      61
  13 KomodoDragon 3.3 avx2     :    3456     10    7500  1180  3087  3233  36.3     100
  14 Stormphrax 7.0 avx2       :    3407     10    7500   806  2958  3736  30.5     100
  15 RubiChess 250606 a512     :    3365     10    7500   606  2639  4255  25.7      84
  16 Horsie 1.1 a512           :    3360     11    7500   601  2573  4326  25.2     ---

 

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 23363 (= 38.94%) 
--- Number of 1:1 drawn Gamepairs    : 11560 (= 19.27%) 
--- Number of 2-draws drawn Gamepairs: 11803 (= 19.67%) 
------------------------------------------------------------------- 


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

Heimdall 1.4.1, 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"...







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