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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      9  1924.0    2800  68.7  1112  1624   64  58.0    3740     100
   2 Reckless 0.8.0           :    3818      8  1688.0    2800  60.3   833  1710  257  61.1    3744     100
   3 PlentyChess 7.0.0        :    3795      7  1594.5    2800  56.9   713  1763  324  63.0    3746     100
   4 Obsidian 16.0            :    3778      7  1522.5    2800  54.4   637  1771  392  63.3    3747      98
   5 Viridithas 19.0.1        :    3766      7  1474.0    2800  52.6   584  1780  436  63.6    3748     100
   6 Alexandria 8.1.12        :    3739      7  1358.5    2800  48.5   475  1767  558  63.1    3750      81
   7 Caissa 1.24              :    3734      7  1338.5    2800  47.8   468  1741  591  62.2    3750      57
   8 Clover 9.1               :    3733      7  1334.5    2800  47.7   437  1795  568  64.1    3750      94
   9 pawnocchio 1.9           :    3724      8  1298.5    2800  46.4   419  1759  622  62.8    3751      52
  10 Halogen 16               :    3724      7  1297.5    2800  46.3   438  1719  643  61.4    3751      53
  11 Stormphrax 7.0.0         :    3724      7  1296.0    2800  46.3   435  1722  643  61.5    3751      53
  12 Berserk 13               :    3723      7  1294.5    2800  46.2   417  1755  628  62.7    3751     100
  13 Tarnished 5.0            :    3708      7  1232.0    2800  44.0   364  1736  700  62.0    3752      64
  14 Integral V7              :    3706      7  1224.0    2800  43.7   363  1722  715  61.5    3752     100
  15 Quanticade Cronus 3.0    :    3682      7  1123.0    2800  40.1   292  1662  846  59.4    3754     ---

  Total: 21,000 games played by 15 programs (games available on request)

  White wins: 7,745 (36.9%)
  Black wins: 242 (1.1%)
  Draws: 13,013 (62.0%)
  White score: 67.9%
  Updated: 2026-02-16