Stefan Pohl Computer Chess

Latest Website-News (2026/01/06): Testrun of Stockfish 260101 finished: 0 Celo to Stockfish 251228.

 

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: Pawnocchio 1.9 and Viridithas 19.0

 

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: 2026/01/06: Stockfish 260101 (0 Celo to Stockfish 25128)

 

(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

Download all interesting wins (filtered by EAS-Tool) from the full UHO Ratinglist here

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

 

(best Stockfish Celo: Stockfish 260101: 3876 Celo, latest full release (Stockfish 17.1) had 3854 Celo)

     Program                     Celo    +    - Games    Score   Av.Op. Draws

   1 Stockfish 260101 a512     : 3876    4    4 15000    68.3%   3738   48.4%
   2 Stockfish 17.1 250330     : 3854    4    4 15000    65.4%   3739   48.8%
   3 Torch 4a a512             : 3819    4    4 15000    60.6%   3741   49.4%
   4 Reckless 251212 a512      : 3809    4    4 15000    59.2%   3742   48.6%
   5 PlentyChess 7.0.37        : 3803    4    4 15000    58.3%   3743   48.4%
   6 Obsidian 250706 a512      : 3785    4    4 15000    55.7%   3744   50.0%
   7 Integral 250805 a512      : 3755    4    4 15000    51.3%   3746   49.9%
   8 Berserk 250606 a512       : 3736    4    4 15000    48.6%   3747   50.0%
   9 Alexandria 8.1.12 a512    : 3734    4    4 15000    48.2%   3747   50.1%
  10 Caissa 1.24 a512          : 3696    4    4 15000    42.7%   3750   50.1%
  11 Clover 9.1 a512           : 3693    4    4 15000    42.2%   3750   50.3%
  12 KomodoDragon 3.3 avx2     : 3690    4    4 15000    41.9%   3750   49.8%
  13 Viridithas 18.0 a512      : 3690    4    4 15000    41.8%   3750   49.3%
  14 Quanticade 3.0 a512       : 3678    4    4 15000    40.2%   3751   47.9%
  15 Stormphrax 7.0 avx2       : 3669    4    4 15000    38.9%   3751   48.4%
  16 Horsie 1.1 a512           : 3654    4    4 15000    36.8%   3752   48.7%

 

Games        : 120000 (finished)
White Wins   : 59833 (49.9%)
Black Wins   : 1057   (0.9%)
Draws        : 59110 (49.3%)

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 260101 a512     :    3922     11    7500  5519  1824   157  85.7     100
   2 Stockfish 17.1 250330     :    3854   ----    7500  4908  2226   366  80.3     100
   3 Torch 4a a512             :    3756     10    7500  3943  2719   838  70.7     100
   4 Reckless 251212 a512      :    3729     10    7500  3616  2926   958  67.7     100
   5 PlentyChess 7.0.37        :    3712     10    7500  3451  2958  1091  65.7     100
   6 Obsidian 250706 a512      :    3673     10    7500  3056  3075  1369  61.2     100
   7 Integral 250805 a512      :    3603     10    7500  2345  3196  1959  52.6     100
   8 Berserk 250606 a512       :    3559      9    7500  1896  3250  2354  46.9      83
   9 Alexandria 8.1.12 a512    :    3555     10    7500  1884  3195  2421  46.4     100
  10 Caissa 1.24 a512          :    3470     10    7500  1164  3049  3287  35.8      99
  11 KomodoDragon 3.3 avx2     :    3461      9    7500  1116  2979  3405  34.7      55
  12 Clover 9.1 a512           :    3460     10    7500  1105  2991  3404  34.7      86
  13 Viridithas 18.0 a512      :    3455     10    7500  1044  3028  3428  34.1     100
  14 Quanticade 3.0 a512       :    3430     10    7500   889  2887  3724  31.1     100
  15 Stormphrax 7.0 avx2       :    3404     11    7500   727  2769  4004  28.2     100
  16 Horsie 1.1 a512           :    3365     10    7500   542  2518  4440  24.0     ---

 

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 22795 (= 37.99%) 
--- Number of 1:1 drawn Gamepairs    : 11461 (= 19.10%) 
--- Number of 2-draws drawn Gamepairs: 11334 (= 18.89%) 
------------------------------------------------------------------- 

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"...