Stefan Pohl Computer Chess

Latest Website-News (2026/05/26): Testrun of Quanticade 260519 finished: +24 Celo to Quanticade 3.0 - Quanticade re-entered the UHO-Top15 Ratinglist and kicked Pawnocchio 1.9 out.

Testrun of Raphael 4.1.1 finished: Raphael 4.1.1 was a little bit too weak, so the result can only be found in my Full UHO Ratinglist

 

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 testruns: Stockfish 260525 and Berserk 14 (avx512 Binary by Jim Ablett, download here)

 

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: 2026/05/26: Quanticade 260519 (+24 Celo to Quanticade 3.0)

 

(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 260504: 3888 Celo, latest full release (Stockfish 18) has 3873 Celo)

     Program                     Celo    +    - Games    Score   Av.Op. Draws

   1 Stockfish 260517          : 3887    4    4 15000    68.1%   3751   49.3%
   2 Stockfish 18 260131       : 3873    4    4 15000    66.3%   3751   48.9%
   3 Reckless 260502 a512      : 3841    4    4 15000    61.9%   3754   48.8%
   4 Torch 4d a512             : 3827    4    4 15000    59.9%   3755   49.8%
   5 PlentyChess 7.0.37        : 3802    4    4 15000    56.3%   3756   48.6%
   6 Obsidian 250706 a512      : 3785    4    4 15000    53.8%   3757   49.9%
   7 Alexandria 9.0 a512       : 3757    4    4 15000    49.8%   3759   48.9%
   8 Integral 250805 a512      : 3754    4    4 15000    49.4%   3759   50.6%
   9 Berserk 250606 a512       : 3738    4    4 15000    47.0%   3760   50.0%
  10 Viridithas 19.0 a512      : 3724    4    4 15000    45.0%   3761   49.0%
  11 Caissa 1.25 a512          : 3703    4    4 15000    41.9%   3763   49.9%
  12 Quanticade 260519 a512    : 3702    4    4 15000    41.7%   3763   48.4%
  13 Clover 9.1 a512           : 3692    4    4 15000    40.3%   3764   50.6%
  14 KomodoDragon 3.3 avx2     : 3690    4    4 15000    40.0%   3764   49.2%
  15 Halogen 16.0 a512         : 3687    4    4 15000    39.6%   3764   49.2%
  16 Tarnished 5.0 a512        : 3683    4    4 15000    39.0%   3764   49.9%

 

Games        : 120000 (finished)
White Wins   : 59610 (49.7%)
Black Wins   : 1067   (0.9%)
Draws        : 59323 (49.4%)

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 260517          :    3919     11    7500  5468  1872   160  85.4     100
   2 Stockfish 18 260131       :    3873   ----    7500  5070  2130   300  81.8     100
   3 Reckless 260502 a512      :    3780     10    7500  4151  2671   678  73.2     100
   4 Torch 4d a512             :    3744     10    7500  3766  2861   873  69.3     100
   5 PlentyChess 7.0.37        :    3680     10    7500  3100  3090  1310  61.9     100
   6 Obsidian 250706 a512      :    3643     10    7500  2716  3183  1601  57.4     100
   7 Alexandria 9.0 a512       :    3580     10    7500  2041  3335  2124  49.4      90
   8 Integral 250805 a512      :    3574     10    7500  2044  3221  2235  48.7     100
   9 Berserk 250606 a512       :    3537     10    7500  1656  3278  2566  43.9     100
  10 Viridithas 19.0 a512      :    3507     10    7500  1370  3282  2848  40.1     100
  11 Caissa 1.25 a512          :    3459     10    7500  1008  3115  3377  34.2      73
  12 Quanticade 260519 a512    :    3456     10    7500  1031  3021  3448  33.9     100
  13 KomodoDragon 3.3 avx2     :    3432     10    7500   839  2965  3696  31.0      52
  14 Clover 9.1 a512           :    3431     11    7500   831  2977  3692  30.9      94
  15 Halogen 16.0 a512         :    3425     10    7500   821  2884  3795  30.2     100
  16 Tarnished 5.0 a512        :    3411     11    7500   718  2855  3927  28.6     ---

 

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 23370 (= 38.95%) 
--- Number of 1:1 drawn Gamepairs    : 11633 (= 19.39%) 
--- Number of 2-draws drawn Gamepairs: 11737 (= 19.56%) 
------------------------------------------------------------------- 

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

Raphael 4.0, 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, Clarity 8

Below you find a diagram of the progress of Stockfish in my tests since February 2026. 

And below that diagram, the older diagrams.

 

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