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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.

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   # PLAYER                   :  RATING  ERROR  POINTS  PLAYED   (%)     W     D    L  D(%)  OppAvg  CFS(%)
   1 Stockfish 18             :    3879      8  2020.5    3000  67.3  1138  1765   97  58.8    3750     100
   2 Reckless 0.9.0           :    3854      8  1919.5    3000  64.0  1021  1797  182  59.9    3752     100
   3 Torch 4d                 :    3840      7  1858.0    3000  61.9   950  1816  234  60.5    3753     100
   4 PlentyChess 7.0.0        :    3796      7  1669.5    3000  55.6   729  1881  390  62.7    3756     100
   5 Obsidian 16.0            :    3778      7  1589.5    3000  53.0   642  1895  463  63.2    3757      98
   6 Viridithas 19.0.1        :    3767      7  1540.5    3000  51.4   593  1895  512  63.2    3758      80
   7 Alexandria 9.0           :    3762      7  1520.5    3000  50.7   564  1913  523  63.8    3758     100
   8 Caissa 1.25              :    3734      7  1393.5    3000  46.5   447  1893  660  63.1    3760      78
   9 Clover 9.1               :    3730      7  1375.5    3000  45.9   436  1879  685  62.6    3760      84
  10 Stormphrax 7.0.0         :    3724      7  1351.5    3000  45.0   421  1861  718  62.0    3760      52
  11 Berserk 13               :    3724      7  1350.5    3000  45.0   407  1887  706  62.9    3760      58
  12 pawnocchio 1.9           :    3723      7  1345.5    3000  44.9   415  1861  724  62.0    3760      56
  13 Halogen 16               :    3722      7  1342.0    3000  44.7   416  1852  732  61.7    3761      99
  14 Integral V7              :    3708      7  1281.5    3000  42.7   368  1827  805  60.9    3761      52
  15 Tarnished 5.0            :    3708      7  1280.5    3000  42.7   351  1859  790  62.0    3761     100
  16 Quanticade Cronus 3.0    :    3681      7  1161.5    3000  38.7   282  1759  959  58.6    3763     ---

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

  White wins: 8,864 (36.93%)
  Black wins: 316 (1.32%)
  Draws: 14,820 (61.75%)
  White score: 67.81%

  Updated: 2026-04-08