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 1964.5 2800 70.2 1194 1541 65 55.0 3706 100
2 Obsidian 16 : 3791 8 1706.0 2800 60.9 890 1632 278 58.3 3711 100
3 PlentyChess 6.0.0 : 3774 8 1640.0 2800 58.6 821 1638 341 58.5 3712 100
4 Stormphrax 7.0.0 : 3747 7 1529.5 2800 54.6 688 1683 429 60.1 3714 92
5 Berserk 13 : 3740 7 1499.5 2800 53.6 645 1709 446 61.0 3715 92
6 Caissa 1.22 : 3732 7 1467.0 2800 52.4 596 1742 462 62.2 3715 91
7 Alexandria 8.0.0 : 3725 7 1437.5 2800 51.3 580 1715 505 61.3 3716 54
8 Integral V7 : 3725 7 1435.0 2800 51.3 578 1714 508 61.2 3716 100
9 Viridithas 17.0.0 : 3704 7 1348.5 2800 48.2 485 1727 588 61.7 3717 50
10 Clover 8.2 : 3704 7 1348.5 2800 48.2 501 1695 604 60.5 3717 99
11 Horsie 1.1 : 3692 7 1298.5 2800 46.4 440 1717 643 61.3 3718 100
12 Motor 0.9.0 : 3661 8 1171.0 2800 41.8 335 1672 793 59.7 3720 100
13 Starzix 6.0 : 3638 7 1081.0 2800 38.6 288 1586 926 56.6 3722 75
14 RubiChess 20240817 : 3635 7 1066.5 2800 38.1 256 1621 923 57.9 3722 100
15 Quanticade Orion 2.0 : 3619 8 1007.0 2800 36.0 193 1628 979 58.1 3723 ---
Total: 21'000 games played by 15 programs (games available on request)
White wins: 8'074 (38.4%)
Black wins: 416 (2.0%)
Draws: 12'510 (59.6%)
White score: 68.2% Updated: 2025-07-14