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 18             :    3879      8  1909.0    2800  68.2  1090  1638   72  58.5    3744     100
   2 Reckless 0.9.0           :    3853      8  1812.0    2800  64.7   985  1654  161  59.1    3746     100
   3 PlentyChess 7.0.0        :    3797      7  1586.5    2800  56.7   709  1755  336  62.7    3750     100
   4 Obsidian 16.0            :    3778      7  1507.5    2800  53.8   613  1789  398  63.9    3751      99
   5 Viridithas 19.0.1        :    3766      7  1455.5    2800  52.0   560  1791  449  64.0    3752      62
   6 Alexandria 9.0           :    3764      7  1449.0    2800  51.8   560  1778  462  63.5    3752     100
   7 Caissa 1.24              :    3731      7  1311.0    2800  46.8   441  1740  619  62.1    3754      56
   8 Clover 9.1               :    3730      7  1307.5    2800  46.7   427  1761  612  62.9    3754      84
   9 Berserk 13               :    3725      7  1284.5    2800  45.9   407  1755  638  62.7    3755      51
  10 Stormphrax 7.0.0         :    3725      7  1284.0    2800  45.9   422  1724  654  61.6    3755      58
  11 Halogen 16               :    3724      7  1279.5    2800  45.7   418  1723  659  61.5    3755      54
  12 pawnocchio 1.9           :    3723      7  1277.5    2800  45.6   401  1753  646  62.6    3755      99
  13 Tarnished 5.0            :    3709      8  1220.5    2800  43.6   352  1737  711  62.0    3756      70
  14 Integral V7              :    3706      7  1208.5    2800  43.2   354  1709  737  61.0    3756     100
  15 Quanticade Cronus 3.0    :    3682      8  1107.5    2800  39.6   281  1653  866  59.0    3758     ---

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

  White wins: 7,749 (36.9%)
  Black wins: 271 (1.3%)
  Draws: 12,980 (61.8%)
  White score: 67.8%
  Updated: 2026-03-03