Stefan Pohl Computer Chess

Home of famous UHO openings and EAS Ratinglist


Latest Website-News (2025/02/10): Testrun of Stockfish 250205 finished: +2 Celo to Stockfish 250126 and a new all-time highscore of 3853 SPCC-Celo.

Gamepair head-to-head of SF 250205 vs. SF 17: +139 =288 -73 (500 pairs) (=56.6%)

Bad news is, that the EAS-score of Stockfish regressed from more than 200k in May 2024 to around 150k today. In the UHO-Top15 Ratinglist, this is still the highest value of all engines, but compared to really aggressive playing engines (Patricia, Rebel Extreme, Velvet Risky), an EAS-Score of 150k is not very impressive and nothing special at all. I see so much room for improvement here for Stockfish...

 

Super 3 Tournament updated.

 

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)

 

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: 2025/02/10: Stockfish 250205  (+2 Celo to Stockfish 250126)

 

(Ordo-calculation fixed to Stockfish 17 = 3843 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 Fritz18 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 250205: 3853 Celo, latest full release (Stockfish 17) had 3843 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 250205 a512    : 3853    4    4 15000    70.1%   3700   48.3%
   2 Stockfish 17 240906      : 3843    4    4 15000    68.8%   3701   48.8%
   3 Torch 3.1 a512           : 3805    4    4 15000    63.8%   3703   48.7%
   4 Obsidian 15.0 a512       : 3762    4    4 15000    57.7%   3706   49.4%
 [   Lc0 0.32dev BT4-6077500  : 3759   15   15  1000 (NN vs SF15.1 testing)]
   5 PlentyChess 4.0 a512     : 3720    4    4 15000    51.6%   3709   48.2%
   6 Berserk 13 avx2          : 3719    4    4 15000    51.4%   3709   51.6%
   7 KomodoDragon 3.3 avx2    : 3714    4    4 15000    50.8%   3709   50.4%
   8 Caissa 1.21 a512         : 3692    4    4 15000    47.6%   3711   50.8%
   9 Alexandria 7.1 a512      : 3691    4    4 15000    47.4%   3711   50.7%
  10 Ethereal 14.38 avx2      : 3661    4    4 15000    43.1%   3713   49.9%
  11 Integral 6.0 a512        : 3656    4    4 15000    42.4%   3713   49.9%
  12 Horsie 1.0 a512          : 3653    4    4 15000    41.9%   3713   50.2%
  13 Viridithas 16.0 a512     : 3653    4    4 15000    41.8%   3713   49.9%
  14 RubiChess 240817 avx2    : 3648    4    4 15000    41.1%   3714   50.0%
  15 Starzix 6.0 a512         : 3643    4    4 15000    40.4%   3714   49.8%
  16 Clover 8.1 avx2          : 3640    4    4 15000    40.0%   3714   51.0%


Games        : 120000 (finished)

White Wins   : 58665 (48.9%)
Black Wins   : 1520   (1.3%)
Draws        : 59815 (49.8%)


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 250205 a512    :    3878     12    7500  5968  1396   136  88.9     100
   2 Stockfish 17 240906      :    3843   ----    7500  5733  1543   224  86.7     100
   3 Torch 3.1 a512           :    3711     11    7500  4644  2173   683  76.4     100
   4 Obsidian 15.0 a512       :    3597     11    7500  3514  2691  1295  64.8     100
   5 PlentyChess 4.0 a512     :    3497     11    7500  2400  3134  1966  52.9      62
   6 Berserk 13 avx2          :    3496     11    7500  2394  3120  1986  52.7      96
   7 KomodoDragon 3.3 avx2    :    3488     10    7500  2326  3115  2059  51.8     100
   8 Caissa 1.21 a512         :    3437     11    7500  1790  3200  2510  45.2      81
   9 Alexandria 7.1 a512      :    3433     11    7500  1770  3165  2565  44.7     100
  10 Ethereal 14.38 avx2      :    3369     11    7500  1241  3008  3251  36.6     100
  11 Integral 6.0 a512        :    3355     11    7500  1097  3034  3369  34.9      71
  12 Viridithas 16.0 a512     :    3352     11    7500  1109  2968  3423  34.6      91
  13 Horsie 1.0 a512          :    3347     11    7500  1044  2991  3465  33.9      61
  14 RubiChess 240817 avx2    :    3345     11    7500  1082  2894  3524  33.7     100
  15 Starzix 6.0 a512         :    3330     11    7500   919  2937  3644  31.8     100
  16 Clover 8.1 avx2          :    3318     11    7500   842  2885  3773  30.5     ---


------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 22127 (= 36.88%) 
--- Number of 1:1 drawn Gamepairs    : 10635 (= 17.72%) 
--- Number of 2-draws drawn Gamepairs: 11492 (= 19.15%) 
------------------------------------------------------------------- 


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

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"...







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