Stefan Pohl Computer Chess

Latest Website-News (2026/06/19): Testrun of Stockfish 260614 finished: +3 Celo to Stockfish 260606.

 

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: Quanticade 260617 (new dev, taken from official GitHub)

 

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: 2026/06/19: Stockfish 260614 (+3 Celo to Stockfish 260606)

 

(Ordo-calculation fixed to Stockfish 18 = 3873 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 260614: 3891 Celo, latest full release (Stockfish 18) has 3873 Celo)

     Program                     Celo    +    - Games    Score   Av.Op. Draws

   1 Stockfish 260614          : 3891    4    4 15000    68.1%   3755   48.6%
   2 Stockfish 18 260131       : 3873    4    4 15000    65.8%   3756   48.9%
   3 Reckless 260502 a512      : 3839    4    4 15000    61.2%   3758   48.5%
   4 Torch 4d a512             : 3824    4    4 15000    58.9%   3759   49.8%
   5 PlentyChess 7.0.37        : 3798    4    4 15000    55.1%   3761   48.6%
   6 Obsidian 250706 a512      : 3779    4    4 15000    52.4%   3762   49.3%
   7 Alexandria 9.0 a512       : 3752    4    4 15000    48.4%   3764   48.8%
   8 Pawnocchio 260527 a512    : 3750    4    4 15000    48.1%   3764   49.3%
   9 Integral 250805 a512      : 3748    4    4 15000    47.8%   3764   50.3%
  10 Berserk 14.0 a512         : 3734    3    3 15000    45.8%   3765   49.2%
  11 Viridithas 19.0 a512      : 3718    4    4 15000    43.4%   3766   49.1%
  12 Raphael 260609 a512       : 3710    4    4 15000    42.3%   3767   49.1%
  13 Halogen 16.5 a512         : 3702    4    4 15000    41.1%   3767   48.7%
  14 Caissa 1.25 a512          : 3699    4    4 15000    40.7%   3767   49.3%
  15 Tarnished 6.0 a512        : 3698    4    4 15000    40.6%   3767   49.5%
  16 Quanticade 260519 a512    : 3696    4    4 15000    40.2%   3768   48.1%

 

Games        : 120000 (finished)
White Wins   : 60224 (50.2%)
Black Wins   : 893    (0.7%)
Draws        : 58883 (49.1%)

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 260614          :    3930     11    7500  5480  1882   138  85.6     100
   2 Stockfish 18 260131       :    3873   ----    7500  4977  2204   319  81.1     100
   3 Reckless 260502 a512      :    3777     10    7500  3977  2804   719  71.7     100
   4 Torch 4d a512             :    3740     10    7500  3540  3061   899  67.6     100
   5 PlentyChess 7.0.37        :    3675     10    7500  2837  3282  1381  59.7     100
   6 Obsidian 250706 a512      :    3636     10    7500  2436  3346  1718  54.8     100
   7 Alexandria 9.0 a512       :    3575     10    7500  1800  3428  2272  46.9      90
   8 Pawnocchio 260527 a512    :    3570     10    7500  1798  3323  2379  46.1      76
   9 Integral 250805 a512      :    3567     10    7500  1761  3336  2403  45.7     100
  10 Berserk 14.0 a512         :    3534     10    7500  1429  3365  2706  41.5     100
  11 Viridithas 19.0 a512      :    3501     10    7500  1149  3279  3072  37.2     100
  12 Raphael 260609 a512       :    3480     10    7500  1020  3151  3329  34.6     100
  13 Halogen 16.5 a512         :    3468     10    7500   914  3140  3446  33.1      99
  14 Caissa 1.25 a512          :    3457     10    7500   842  3081  3577  31.8      52
  15 Tarnished 6.0 a512        :    3457     10    7500   872  3017  3611  31.7      94
  16 Quanticade 260519 a512    :    3450     10    7500   809  3019  3672  30.9     ---

 

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 24359 (= 40.60%) 
--- Number of 1:1 drawn Gamepairs    : 12431 (= 20.72%) 
--- Number of 2-draws drawn Gamepairs: 11928 (= 19.88%) 
------------------------------------------------------------------- 

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

Icarus 1.1, 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"...