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 8 1964.0 2800 70.1 1191 1546 63 55.2 3706 100
2 Obsidian 16 : 3792 8 1708.5 2800 61.0 883 1651 266 59.0 3711 100
3 PlentyChess 6.0.0 : 3777 8 1648.5 2800 58.9 835 1627 338 58.1 3712 100
4 Stormphrax 7.0.0 : 3747 8 1527.0 2800 54.5 683 1688 429 60.3 3714 85
5 Berserk 13 : 3741 7 1502.0 2800 53.6 638 1728 434 61.7 3715 90
6 Caissa 1.22 : 3734 7 1474.0 2800 52.6 598 1752 450 62.6 3715 87
7 Integral V7 : 3728 7 1448.0 2800 51.7 597 1702 501 60.8 3716 57
8 Alexandria 8.0.0 : 3727 7 1444.0 2800 51.6 582 1724 494 61.6 3716 100
9 Viridithas 17.0.0 : 3706 8 1356.5 2800 48.4 489 1735 576 62.0 3717 99
10 Horsie 1.1 : 3693 7 1303.5 2800 46.6 454 1699 647 60.7 3718 90
11 Clover 8.1 : 3686 7 1274.0 2800 45.5 419 1710 671 61.1 3719 100
12 Motor 0.9.0 : 3662 8 1175.5 2800 42.0 346 1659 795 59.3 3720 100
13 Starzix 6.0 : 3641 8 1090.0 2800 38.9 297 1586 917 56.6 3722 82
14 RubiChess 20240817 : 3635 7 1069.5 2800 38.2 263 1613 924 57.6 3722 99
15 Quanticade Orion 2.0 : 3622 8 1015.0 2800 36.3 200 1630 970 58.2 3723 ---
Total: 21'000 games played by 15 programs (games available on request)
White wins: 8'065 (38.4%)
Black wins: 410 (2.0%)
Draws: 12'525 (59.6%)
White score: 68.2% Updated: 2025-06-25