Stefan Pohl Computer Chess

Latest Website-News (2024/05/02): Testrun of Ethereal 14.38 finished: +46 Elo to Ethereal 14.25. Impressive progress. Ethereal 14.38 jumped (back) on rank #6 in my UHO-Top15 Ratinglist. 

More good news: Ethereal 14.38 plays more sacrifices than ever (only Stockfish plays more sacs (!)). Sadly, the number of short wins is still very small and the number of bad draws and the average length of all won games are still very high, so the EAS-Score of Ethereal 14.38 is still not overwhelming (but measureable higher than Ethereal 14.25)...

 

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: Stockfish 240428

 

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 3900 12-core (24 threads) notebook with 32GB RAM. 

Speed: (singlethread, TurboBoost-mode switched off, chess starting position) Stockfish 16.1: 500 kn/s (when 20 games are running simultaneously)

Hash: 256MB 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, insufficent material))

Tablebases: None for engines, 5 Syzygy for cutechess-cli

Openings: My UHO_2022_6mvs_+120_+129 openings are used (first 500 lines) (part of my UHO 2022 download). 

Ponder, Large Memory Pages & learning: Off

Thinking time: 3min+1sec per game/engine (average game-duration: 7 min 50sec), around 3500-4000 games in 24 hours are played. One testrun (15000 games) takes around 100 hours (=4 days and some hours)

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 AVX2-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: 2024/05/02: Ethereal 14.38 (+46 Elo to Ethereal 14.25)

 

(Ordo-calculation fixed to Stockfish 16.1 = 3833 Elo)

 

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 Elo so far: Stockfish 240424: 3844 Elo, latest full release (Stockfish 16.1) had 3833 Elo)

(Read the explanation of the Lc0-entry in the Ratinglist here).

     Program                    Elo    +    -  Games    Score   Av.Op. Draws

   1 Stockfish 240424 avx2    : 3843    4    4 15000    71.8%   3673   47.6%
   2 Stockfish 16.1 240224    : 3833    4    4 15000    70.5%   3674   47.9%
   3 Torch 2 popavx2          : 3802    4    4 15000    66.6%   3676   47.9%
  [  Lc0 0.31dev T3-2815      : 3780   15   15  1000 (NN vs SF15.1 testing)]
   4 Berserk 13 avx2          : 3749    4    4 15000    59.5%   3679   49.0%
   5 KomodoDragon 3.3 avx2    : 3739    4    4 15000    58.0%   3680   49.7%
   6 Ethereal 14.38 avx2      : 3703    4    4 15000    52.9%   3682   49.2%
   7 Obsidian 12.0 avx2       : 3697    4    4 15000    52.0%   3683   50.9%
   8 Caissa 1.18 avx2         : 3680    4    4 15000    49.6%   3684   49.7%
   9 RubiChess 240112 avx2    : 3657    4    4 15000    46.3%   3685   49.0%
  10 PlentyChess 1.0 avx2     : 3634    4    4 15000    43.0%   3687   49.9%
  11 Alexandria 6.1.0 avx2    : 3613    4    4 15000    40.1%   3688   49.6%
  12 Seer 2.8.0 avx2          : 3611    4    4 15000    39.8%   3688   49.5%
  13 CSTal 2.0 avx2           : 3600    4    4 15000    38.3%   3689   50.6%
  14 Rebel 16.3 avx2          : 3599    4    4 15000    38.2%   3689   49.5%
  15 Clover 6.1 avx2          : 3592    4    4 15000    37.2%   3690   50.2%
  16 Koivisto 9.2 avx2        : 3585    4    4 15000    36.2%   3690   49.0%

Games        : 120000 (finished)

White Wins   : 58027 (48.4 %)
Black Wins   : 2777 (2.3 %)
Draws        : 59196 (49.3 %)

Below the UHO-Top15 Ratinglist, recalculated with Gamepairs (using my Gamepair Rescoring Tool V1.5), 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)."

See the head-to-head gamepair-statistics of the UHO-Top15 Ratinglist here

   # PLAYER                   :  RATING  ERROR  PLAYED     W     D     L   (%)  CFS(%)
   1 Stockfish 240424 avx2    :    3874     14    7500  6285  1079   136  91.0     100
   2 Stockfish 16.1 240224    :    3833   ----    7500  6058  1213   229  88.9     100
   3 Torch 2 popavx2          :    3708     12    7500  5213  1726   561  81.0     100
   4 Berserk 13 avx2          :    3546     13    7500  3946  2227  1327  67.5     100
   5 KomodoDragon 3.3 avx2    :    3523     13    7500  3727  2336  1437  65.3     100
   6 Ethereal 14.38 avx2      :    3427     12    7500  2806  2669  2025  55.2     100
   7 Obsidian 12.0 avx2       :    3410     13    7500  2624  2763  2113  53.4     100
   8 Caissa 1.18 avx2         :    3373     12    7500  2349  2681  2470  49.2     100
   9 RubiChess 240112 avx2    :    3326     12    7500  1923  2733  2844  43.9     100
  10 PlentyChess 1.0 avx2     :    3266     13    7500  1398  2762  3340  37.1     100
  11 Alexandria 6.1.0 avx2    :    3223     13    7500  1124  2587  3789  32.2      99
  12 Seer 2.8.0 avx2          :    3212     13    7500  1041  2566  3893  31.0     100
  13 Rebel 16.3 avx2          :    3182     13    7500   851  2473  4176  27.8      61
  14 CSTal 2.0 avx2           :    3181     12    7500   855  2445  4200  27.7     100
  15 Clover 6.1 avx2          :    3156     13    7500   749  2268  4483  25.1     100
  16 Koivisto 9.2 avx2        :    3143     13    7500   680  2214  4606  23.8     ---

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 18371 (= 30.62%) 
--- Number of 1:1 drawn Gamepairs    : 8550  (= 14.25%) 
--- Number of 2-draws drawn Gamepairs: 9821  (= 16.37%) 
------------------------------------------------------------------- 

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

Minic 3.40, Stormphrax 4.1.0, 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"...