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 1976.0 2800 70.6 1211 1530 59 54.6 3703 100
2 Obsidian 16 : 3793 8 1727.5 2800 61.7 905 1645 250 58.8 3708 100
3 PlentyChess 6.0.0 : 3778 7 1666.0 2800 59.5 857 1618 325 57.8 3709 100
4 Berserk 13 : 3743 7 1525.0 2800 54.5 668 1714 418 61.2 3711 83
5 Caissa 1.22 : 3738 7 1503.0 2800 53.7 633 1740 427 62.1 3711 94
6 Integral V7 : 3729 8 1468.5 2800 52.4 627 1683 490 60.1 3712 53
7 Alexandria 8.0.0 : 3729 7 1467.0 2800 52.4 608 1718 474 61.4 3712 100
8 Viridithas 17.0.0 : 3710 8 1388.5 2800 49.6 509 1759 532 62.8 3713 99
9 Horsie 1.1 : 3697 8 1332.5 2800 47.6 490 1685 625 60.2 3714 85
10 Clover 8.1 : 3691 8 1308.0 2800 46.7 457 1702 641 60.8 3715 100
11 Motor 0.9.0 : 3664 8 1196.5 2800 42.7 371 1651 778 59.0 3717 65
12 Stormphrax 6.0.0 : 3661 7 1188.0 2800 42.4 378 1620 802 57.9 3717 100
13 Starzix 6.0 : 3645 8 1120.5 2800 40.0 321 1599 880 57.1 3718 78
14 RubiChess 20240817 : 3640 7 1103.0 2800 39.4 287 1632 881 58.3 3718 100
15 Quanticade Orion 2.0 : 3622 8 1030.0 2800 36.8 221 1618 961 57.8 3720 ---
Total: 21'000 games played by 15 programs
White wins: 8'155 (38.8%)
Black wins: 388 (1.8%)
Draws: 12'457 (59.3%)
White score: 68.5%
Updated: 2025-06-10