Stefan Pohl Computer Chess

Home of famous UHO openings and EAS Ratinglist


Latest Website-News (2025/06/16): Testrun of RubiChess 250606 (dev avx512 binary by Jim Ablett, download here) finished: +31 Celo to RubiChess 240817.

 

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: PlentyChess 6.02 (the author achieved a +10% speed-gain of the avx512 binary, which is now even faster than Jim Ablett's avx512 binary of PlentyChess 6.0 on my machines. And a new patch was also included, so a new PlentyChess testrun makes sense (and looks very promising so far), IMHO.)

 

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: 2025/06/16: RubiChess 250606 (+31 Celo to RubiChess 240817)

 

(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 250525 a512    : 3855    4    4 15000    68.8%   3714   48.8%
   2 Stockfish 17.1 250330    : 3854    4    4 15000    68.6%   3714   48.6%
   3 Torch 3.1 a512           : 3795    4    4 15000    60.6%   3718   48.9%
   4 Obsidian 16.0v a512      : 3784    4    4 15000    58.9%   3719   49.6%
   5 Berserk 250606 a512      : 3754    4    4 15000    54.7%   3721   49.7%
 [   Lc0 0.32dev BT4-6077500  : 3753   15   15  1000 (NN vs SF15.1 testing)]
   6 PlentyChess 6.0 a512     : 3751    4    4 15000    54.2%   3721   49.6%
   7 Alexandria 8.0 a512      : 3722    4    4 15000    50.0%   3723   50.4%
   8 KomodoDragon 3.3 avx2    : 3702    4    4 15000    47.0%   3724   50.2%
   9 Caissa 1.22 a512         : 3694    4    4 15000    45.9%   3725   50.7%
  10 Integral 7.0 a512        : 3690    4    4 15000    45.2%   3725   48.6%
  11 Reckless 250521 a512     : 3670    4    4 15000    42.4%   3726   49.4%
  12 Viridithas 17.0 a512     : 3668    4    4 15000    42.1%   3726   51.3%
  13 Horsie 1.1 a512          : 3665    4    4 15000    41.6%   3727   49.2%
  14 RubiChess 250606 a512    : 3665    4    4 15000    41.6%   3727   50.2%
  15 Ethereal 14.38 avx2      : 3650    4    4 15000    39.5%   3728   49.7%
  16 Motor 0.90 avx2          : 3645    4    4 15000    38.9%   3728   50.6%

 

Games        : 120000 (finished)
White Wins   : 59159 (49.3%)
Black Wins   : 1191   (1.0%)
Draws        : 59650 (49.7%)


Below the UHO-Top15 Ratinglist, recalculated with Gamepairs (using my Gamepair Rescoring Tool V1.5), Ordo-calculation fixed to Stockfish 17 = 3843 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 250525 a512    :    3861     12    7500  5673  1666   161  86.7      89
   2 Stockfish 17.1 250330    :    3854   ----    7500  5642  1653   205  86.2     100
   3 Torch 3.1 a512           :    3673     11    7500  3937  2678   885  70.3     100
   4 Obsidian 16.0v a512      :    3646     11    7500  3664  2779  1057  67.4     100
   5 Berserk 250606 a512      :    3573     11    7500  2875  3091  1534  58.9      95
   6 PlentyChess 6.0 a512     :    3566     11    7500  2787  3136  1577  58.1     100
   7 Alexandria 8.0 a512      :    3501     11    7500  2117  3234  2149  49.8     100
   8 KomodoDragon 3.3 avx2    :    3460     11    7500  1727  3228  2545  44.5     100
   9 Caissa 1.22 a512         :    3440     11    7500  1571  3154  2775  42.0     100
  10 Integral 7.0 a512        :    3428     11    7500  1426  3223  2851  40.5     100
  11 Viridithas 17.0 a512     :    3384     11    7500  1115  3015  3370  35.0      54
  12 Reckless 250521 a512     :    3383     10    7500  1120  2998  3382  34.9      96
  13 RubiChess 250606 a512    :    3376     11    7500  1018  3064  3418  34.0      90
  14 Horsie 1.1 a512          :    3370     11    7500  1026  2949  3525  33.3     100
  15 Ethereal 14.38 avx2      :    3341     11    7500   845  2787  3868  29.8     100
  16 Motor 0.90 avx2          :    3328     11    7500   762  2735  4003  28.4     ---

 

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 22695 (= 37.82%) 
--- Number of 1:1 drawn Gamepairs    : 11107 (= 18.51%) 
--- Number of 2-draws drawn Gamepairs: 11588 (= 19.31%) 
------------------------------------------------------------------- 


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

Renegade 1.2.0, Igel 3.6.0, Minic 3.41, Booot 7.3, Black Marlin 9.0, Equisetum 1.0


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"...







Sie sind Besucher Nr.