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Chess engine: Obsidian 10.0 NNUE

on


Obsidian, an UCI chess engine written in c++
Rating CEDR=3550

Obsidian - rating CEDR progres
Pl Engine Rating Score Games %
716 Obsidian 7.0 3550.4 252.50 546 46.25
797 Obsidian 6.0 3442.1 142.00 330 43.03
884 Obsidian 5.0 3327.6 95.00 227 41.85
947 Obsidian 4.0 3245.9 85.50 218 39.22
1153 Obsidian 1.0 2979.0 82.50 206 40.05



v.10.0:
This update brings quite large Elo gains, but also important bug fixes (such as taking a tiny amount of CPU while not searching).
The neural network is the same, and the improvements are only about search and performance.
Regarding usability, Obsidian finally supports being executed on hardware where pext is unavailable or slow (Ryzen 3...)

Elo difference:

Obsidian 10.0 vs Obsidian 9.0 (STC)
Elo   | 53.07 +- 6.69 (95%)
Conf  | 10.0+0.1s Threads=1 Hash=16MB
Games | N: 5008 W: 1588 L: 829 D: 2591
Penta | [6, 306, 1165, 977, 50]

Obsidian 10.0 vs Obsidian 9.0 (LTC)
Elo   | 56.96 +- 10.43 (95%)
Conf  | 40.0+0.4s Threads=1 Hash=64MB
Games | N: 2000 W: 630 L: 305 D: 1065
Penta | [1, 93, 496, 400, 10]




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