Logo

Tournament Info
Top15 round-robin tournament of free engines only, using Stefan Pohl's unbalanced 3-move book Chess324xxl_big+090_+119.pgn played reversed sides per pairing.

Time Control: game in 2 minutes plus 1 second increment, 2'+1"
Hardware: Intel i7 12700, i9 10900 and AMD Ryzen 5900X (performance roughly equalised via power settings)
CuteChess GUI: Concurrency limited to number of actual cores (P cores in case of i7 12700)
Each engine 512MB hash, 1 thread, ponder off
Each pairing 100 openings
Adjudication: Syzygy 5-men only - no eval based adjudication.
Endgame tablebases: Syzygy 5-men.
Ratings calculated with Ordo.

Join me on Chess Engine Testers Discord server 

   # PLAYER                   :  RATING  ERROR  POINTS  PLAYED   (%)     W     D    L  D(%)  OppAvg  CFS(%)
   1 Stockfish 18             :    3879      8  2012.5    3000  67.1  1128  1769  103  59.0    3752     100
   2 Reckless 0.9.0           :    3854      8  1911.0    3000  63.7  1009  1804  187  60.1    3754     100
   3 Torch 4d                 :    3838      7  1843.5    3000  61.5   933  1821  246  60.7    3755     100
   4 PlentyChess 7.0.0        :    3796      7  1660.0    3000  55.3   720  1880  400  62.7    3758     100
   5 Obsidian 16.0            :    3776      7  1571.5    3000  52.4   619  1905  476  63.5    3759      96
   6 Viridithas 19.0.1        :    3766      7  1529.0    3000  51.0   584  1890  526  63.0    3760      62
   7 Berserk 14               :    3765      7  1522.0    3000  50.7   562  1920  518  64.0    3760      62
   8 Alexandria 9.0           :    3763      7  1515.0    3000  50.5   561  1908  531  63.6    3760     100
   9 Caissa 1.25              :    3734      7  1384.0    3000  46.1   441  1886  673  62.9    3762      83
  10 Clover 9.1               :    3729      7  1362.0    3000  45.4   416  1892  692  63.1    3762      87
  11 Stormphrax 7.0.0         :    3723      7  1337.0    3000  44.6   412  1850  738  61.7    3763      53
  12 pawnocchio 1.9           :    3723      7  1335.0    3000  44.5   405  1860  735  62.0    3763      61
  13 Halogen 16               :    3721      7  1328.5    3000  44.3   404  1849  747  61.6    3763     100
  14 Integral V7              :    3707      7  1265.0    3000  42.2   352  1826  822  60.9    3764      54
  15 Tarnished 5.0            :    3706      7  1262.5    3000  42.1   322  1881  797  62.7    3764     100
  16 Quanticade Cronus 3.0    :    3683      7  1161.5    3000  38.7   279  1765  956  58.8    3765     ---

  Total: 24,000 games played by 16 programs (games available on request)

  White wins: 8,838 (36.83%)
  Black wins: 309 (1.29%)
  Draws: 14,853 (61.89%)
  White score: 67.77%

  Updated: 2026-05-27