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 17.1       :    3859      8  1907.5    2800  68.1  1100  1615   85  57.7    3723     100
   2 Reckless 0.8.0       :    3814      7  1733.5    2800  61.9   876  1715  209  61.3    3727      98
   3 PlentyChess 7.0.0    :    3803      8  1691.5    2800  60.4   864  1655  281  59.1    3727     100
   4 Obsidian 16          :    3776      8  1582.0    2800  56.5   726  1712  362  61.1    3729     100
   5 Clover 9.1           :    3735      7  1409.5    2800  50.3   515  1789  496  63.9    3732      60
   6 Alexandria 8.1.0     :    3733      7  1403.5    2800  50.1   545  1717  538  61.3    3732      78
   7 Stormphrax 7.0.0     :    3729      7  1386.0    2800  49.5   511  1750  539  62.5    3733      63
   8 Caissa 1.23          :    3727      7  1378.5    2800  49.2   505  1747  548  62.4    3733      56
   9 Viridithas 18.0.0    :    3726      7  1375.0    2800  49.1   496  1758  546  62.8    3733      58
  10 Berserk 13           :    3725      7  1370.5    2800  48.9   486  1769  545  63.2    3733      97
  11 Integral V7          :    3715      7  1329.0    2800  47.5   462  1734  604  61.9    3734     100
  12 Horsie 1.1           :    3679      7  1178.5    2800  42.1   343  1671  786  59.7    3736      95
  13 pawnocchio 1.8       :    3670      7  1143.0    2800  40.8   304  1678  818  59.9    3737     100
  14 Halogen 15           :    3651      8  1065.0    2800  38.0   273  1584  943  56.6    3738      78
  15 Motor 0.9.0          :    3646      7  1047.0    2800  37.4   237  1620  943  57.9    3739     ---

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

  White wins: 7'953 (37.9%)
  Black wins: 290 (1.4%)
  Draws: 12'757 (60.7%)
  White score: 68.2%



  Updated: 2025-09-27