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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  2022.5    3000  67.4  1138  1769   93  59.0    3749     100
   2 Reckless 0.9.0           :    3854      7  1922.0    3000  64.1  1028  1788  184  59.6    3751      99
   3 Torch 4d                 :    3841      7  1865.5    3000  62.2   964  1803  233  60.1    3752     100
   4 PlentyChess 7.0.0        :    3795      7  1669.0    3000  55.6   730  1878  392  62.6    3755     100
   5 Obsidian 16.0            :    3777      7  1589.5    3000  53.0   633  1913  454  63.8    3756      99
   6 Viridithas 19.0.1        :    3764      8  1531.5    3000  51.0   576  1911  513  63.7    3757      57
   7 Alexandria 9.0           :    3763      7  1527.5    3000  50.9   572  1911  517  63.7    3757     100
   8 Clover 9.1               :    3729      7  1376.5    3000  45.9   437  1879  684  62.6    3759      51
   9 Caissa 1.24              :    3729      7  1376.0    3000  45.9   448  1856  696  61.9    3759      85
  10 Stormphrax 7.0.0         :    3724      7  1352.5    3000  45.1   430  1845  725  61.5    3760      51
  11 Berserk 13               :    3724      7  1352.0    3000  45.1   416  1872  712  62.4    3760      57
  12 Halogen 16               :    3723      7  1348.0    3000  44.9   425  1846  729  61.5    3760      55
  13 pawnocchio 1.9           :    3722      7  1345.0    3000  44.8   414  1862  724  62.1    3760      99
  14 Tarnished 5.0            :    3709      7  1285.5    3000  42.9   360  1851  789  61.7    3761      70
  15 Integral V7              :    3706      7  1273.0    3000  42.4   360  1826  814  60.9    3761     100
  16 Quanticade Cronus 3.0    :    3681      7  1164.0    3000  38.8   286  1756  958  58.5    3763     ---

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

  White wins: 8,906 (37.1%)
  Black wins: 311 (1.3%)
  Draws: 14,783 (61.6%)
  White score: 67.91%
  Updated: 2026-03-24