Stefan Pohl Computer Chess

Latest Website-News (2023/12/06): UHO-Top15 Ratinglist testrun of Obsidian 8.0 finished.

Obsidian 8.0 failed to enter the UHO-Top15 Ratinglist, so the result can be found only in the full UHO Ratinglist. See the full UHO Ratinglist 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: Stockfish 231202

The evaluation of the UHO 2024 openings started. NN-testing had to be suspended, because the PC is needed for the evaluation. Estimated time needed: around 75-80 days from today (2023/11/14), if all works without crashes or other problems...

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 15: 750 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).

Latest update: 2023/11/21: Stockfish 231116 (0 Elo to Stockfish 231107)

(Ordo-calculation fixed to Stockfish 16 = 3821 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 231116: 3830 Elo, latest full release (Stockfish 16) had 3821 Elo)

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

     Program                    Elo    +    -  Games    Score   Av.Op. Draws

   1 Stockfish 231116 avx2    : 3830    4    4 15000    72.6%   3651   46.8%
   2 Stockfish 16 230630      : 3821    4    4 15000    71.6%   3651   47.4%
  [  Lc0 0.31dev TCEC 25 SuFi : 3790   15   15  1000 (NN vs SF15.1 testing)]
   3 Torch 1 popavx2          : 3785    4    4 15000    67.1%   3654   47.4%
   4 KomodoDragon 3.3 avx2    : 3754    4    4 15000    63.0%   3656   48.3%
   5 Berserk 12 avx2          : 3732    4    4 15000    60.0%   3657   48.4%
   6 Ethereal 14.25 nnue      : 3678    4    4 15000    52.5%   3661   50.3%
   7 RubiChess 230918 avx2    : 3649    4    4 15000    48.4%   3663   49.9%
   8 Caissa 1.14 avx2         : 3630    4    4 15000    45.7%   3664   49.5%
   9 CSTal 2.0 avx2           : 3623    4    4 15000    44.6%   3664   49.9%
  10 Koivisto 9.2 avx2        : 3604    4    4 15000    42.0%   3666   49.3%
  11 Clover 6 avx2            : 3588    4    4 15000    39.7%   3667   49.5%
  12 Rebel EAS avx2           : 3587    4    4 15000    39.6%   3667   49.1%
  13 RofChade 3.1 avx2        : 3583    4    4 15000    39.1%   3667   47.5%
  14 Seer 2.7.0 avx2          : 3581    4    4 15000    38.8%   3667   47.7%
  15 Uralochka 3.40a avx2     : 3574    4    4 15000    37.9%   3668   47.4%
  16 Revenge 3.0 avx2         : 3570    4    4 15000    37.3%   3668   48.6%

Games        : 120000 (finished)

White Wins   : 58524 (48.8 %)
Black Wins   : 3208 (2.7 %)
Draws        : 58268 (48.6 %)

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 231116 avx2    :    3860     14    7500  6439   938   123  92.1     100
   2 Stockfish 16 230630      :    3821   ----    7500  6264  1021   215  90.3     100
   3 Torch 1 popavx2          :    3666     14    7500  5409  1434   657  81.7     100
   4 KomodoDragon 3.3 avx2    :    3559     14    7500  4679  1769  1052  74.2     100
   5 Berserk 12 avx2          :    3486     14    7500  4149  1945  1406  68.3     100
   6 Ethereal 14.25 nnue      :    3345     14    7500  2905  2427  2168  54.9     100
   7 RubiChess 230918 avx2    :    3278     14    7500  2312  2538  2650  47.7     100
   8 Caissa 1.14 avx2         :    3224     14    7500  1815  2634  3051  41.8     100
   9 CSTal 2.0 avx2           :    3205     14    7500  1629  2689  3182  39.6     100
  10 Koivisto 9.2 avx2        :    3160     14    7500  1323  2553  3624  34.7     100
  11 Rebel EAS avx2           :    3132     14    7500  1121  2493  3886  31.6      98
  12 RofChade 3.1 avx2        :    3122     14    7500  1028  2519  3953  30.5      52
  13 Clover 6 avx2            :    3122     15    7500  1040  2492  3968  30.5      87
  14 Seer 2.7.0 avx2          :    3117     14    7500   997  2493  4010  29.9     100
  15 Uralochka 3.40a avx2     :    3084     15    7500   788  2401  4311  26.5      95
  16 Revenge 3.0 avx2         :    3077     15    7500   748  2362  4390  25.7     ---

------------------------------------------------------------------- 
--- Number of all Gamepairs          : 60000 
--- Number of drawn Gamepairs overall: 17354 (= 28.92%) 
--- Number of 1:1 drawn Gamepairs    : 8287  (= 13.81%) 
--- Number of 2-draws drawn Gamepairs: 9067  (= 15.11%) 
------------------------------------------------------------------- 

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

Minic 3.39

Below you find a diagram of the progress of Stockfish in my tests since April 2022. 

And below that diagram, the older diagrams.

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