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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 17.1        :    3859      9  2109.5    3000  70.3  1285  1649   66  55.0    3705     100
   2 Obsidian 16           :    3789      8  1824.5    3000  60.8   941  1767  292  58.9    3710     100
   3 PlentyChess 6.0.0     :    3774      8  1759.5    3000  58.6   880  1759  361  58.6    3711     100
   4 Stormphrax 7.0.0      :    3750      8  1656.0    3000  55.2   760  1792  448  59.7    3713      97
   5 Berserk 13            :    3740      7  1611.0    3000  53.7   685  1852  463  61.7    3713      95
   6 Caissa 1.22           :    3731      7  1571.0    3000  52.4   624  1894  482  63.1    3714      91
   7 Integral V7           :    3723      7  1538.5    3000  51.3   613  1851  536  61.7    3714      53
   8 Alexandria 8.0.0      :    3723      7  1537.0    3000  51.2   619  1836  545  61.2    3714     100
   9 Clover 8.2            :    3703      7  1449.5    3000  48.3   536  1827  637  60.9    3716      50
  10 Viridithas 17.0.0     :    3703      7  1449.5    3000  48.3   525  1849  626  61.6    3716      99
  11 Horsie 1.1            :    3691      7  1395.0    3000  46.5   488  1814  698  60.5    3717      96
  12 pawnocchio 1.8        :    3682      7  1354.0    3000  45.1   443  1822  735  60.7    3717     100
  13 Motor 0.9.0           :    3658      8  1251.5    3000  41.7   358  1787  855  59.6    3719     100
  14 Halogen 14            :    3640      7  1172.0    3000  39.1   298  1748  954  58.3    3720      69
  15 Starzix 6.0           :    3637      7  1161.0    3000  38.7   304  1714  982  57.1    3720      51
  16 RubiChess 20240817    :    3637      8  1160.5    3000  38.7   293  1735  972  57.8    3720     ---

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

  White wins: 9'177 (38.2%)
  Black wins: 475 (2.0%)
  Draws: 14'348 (59.8%)
  White score: 68.1%

  Updated: 2025-07-30