Stormphrax, UCI chess engine implemented NNUE
Thanks to the author: Conor Anstey, Rating Chess Engines Diary CEDR=3662
Stormphrax 8.0.0 - what's new?
a whole year!
Stormphrax 8.0.0, now with threat inputs and @JonathanHallstrom's pawn-pawn input technologies, and a lot of other grinding. New network (undertown), multipv fixes, and better performance when running multiple instances at once.
Huge thanks to @87flowers, @KazApps and the aforementioned @JonathanHallstrom for their contributions, along with everyone involved with the threat inputs push (see the PR), and everyone who has contributed compute to our OpenBench instance. This release would not have been remotely possible without huge amounts of compute incredibly generously donated by @KazApps.
Results against Stormphrax 7.0.0
STC:
Elo | 62.44 +- 4.24 (95%)
Conf | 8.0+0.08s Threads=1 Hash=16MB
Games | N: 8110 W: 2911 L: 1469 D: 3730
Penta | [46, 461, 1680, 1741, 127]
https://chess.swehosting.se/test/14248/
LTC:
Elo | 81.93 +- 5.07 (95%)
Conf | 60.0+0.60s Threads=1 Hash=128MB
Games | N: 4008 W: 1495 L: 567 D: 1946
Penta | [2, 130, 821, 1040, 11]
https://chess.swehosting.se/test/14249/
SMP VLTC (8 threads):
Elo | 94.51 +- 6.69 (95%)
Conf | 60.0+0.60s Threads=8 Hash=512MB
Games | N: 2000 W: 775 L: 244 D: 981
Penta | [0, 39, 392, 568, 1]
https://chess.swehosting.se/test/14250/
DFRC LTC:
Elo | 94.07 +- 7.39 (95%)
Conf | 60.0+0.60s Threads=1 Hash=128MB
Games | N: 2024 W: 734 L: 199 D: 1091
Penta | [0, 55, 392, 540, 25]
Stormphrax 7.0.0 JA vs other engines:
| Integral 7.0.0 JA | 115.5/254 | -23 | 254 games |
| Clover 9.1 JA | 94/200 | -12 | 200 games |
| Obsidian 16.15 SE | 75/170 | -20 | 170 games |
| Viridithas 18.0.0 | 74/150 | -2 | 150 games |
| Stockfish 17.1 | 46/118 | -26 | 118 games |
| Horsie 1.1.0 | 58.5/116 | +1 | 116 games |
| Motor 0.9.0 | 57/113 | +1 | 113 games |
| Reckless 0.8.0 | 37.5/84 | -9 | 84 games |
| Reckless 0.9.0 dev-0dd5b9ac | 37/84 | -10 | 84 games |
| Cinder 0.4.1 | 29/54 | +4 | 54 games |
| Reckless 0.9.0 JA | 20/46 | -6 | 46 games |
| Titan 1.1.0 | 21/36 | +6 | 36 games |
| RubiChess 20250606 JA | 17.5/36 | -1 | 36 games |
| Viridithas 18.0.0 JA | 17.5/32 | +3 | 32 games |
| Clarity 8.0.0 JA | 18.5/30 | +7 | 30 games |
| Quanticade Cronus 3.0 JA | 12/25 | -1 | 25 games |
| Vafra 12.8 Cfish | 12.5/20 | +5 | 20 games |
| Starzix 6.1 JA | 10/20 | +0 | 20 games |
| Reckless 0.9.0 dev-162f5682 | 8.5/20 | -3 | 20 games |
| Reckless 0.9.0 dev-fe4d4b3d | 8/20 | -4 | 20 games |
| Quanticade 3.0 | 8.5/19 | -2 | 19 games |
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