Obsidian, an UCI chess engine written in c++
Rating Chess Engines Diary CEDR=3734
v.16:
This new version includes a few search patches and a new NNUE architecture, finally with layers.
I dropped support for pre-AVX2, but I might add it back if requested to.
For testers: if you tested 14.24, don't test 15.0, they are exactly the same.
Obsidian 15.0 vs 14.0 (LTC)
Elo | 27.21 +- 4.01 (95%)
Conf | 40.0+0.40s Threads=1 Hash=128MB
Games | N: 7012 W: 2009 L: 1461 D: 3542
Penta | [7, 576, 1796, 1116, 11]
Obsidian 16 vs - other engines:
| Halogen 12.23.0 JA | 14.5/20 | +9 | 20 Games |
| Integral 7.0.0 | 10/19 | +1 | 19 Games |
| PlentyChess 5.0.0 | 9/17 | +1 | 17 Games |
| Killfish PB 200525 | 7/14 | +0 | 14 Games |
| TROY 180525 | 7/14 | +0 | 14 Games |
| SF-PRO2 02.05.2025 | 7/14 | +0 | 14 Games |
| Stockfish 17.1 | 6/13 | -1 | 13 Games |
| Zangdar 4.01 | 9/12 | +6 | 12 Games |
| Uralochka 3.42 dev9 JA | 8/12 | +4 | 12 Games |
| Koivisto 9.2 JA | 7.5/12 | +3 | 12 Games |
| Quanticade Orion 2.0 | 7/12 | +2 | 12 Games |
| Starzix 6.1 JA | 6.5/12 | +1 | 12 Games |
| Cool Iris v19 | 6/12 | +0 | 12 Games |
| Artemis 15TR | 6/12 | +0 | 12 Games |
| SF PB 250525 | 6/12 | +0 | 12 Games |
| SF PB 190525 | 6/12 | +0 | 12 Games |
| DarkSeid 6.0 | 6/12 | +0 | 12 Games |
| Obsidian 16.01 | 6/12 | +0 | 12 Games |
| RapTora 6 | 5.5/11 | +0 | 11 Games |
| Critter 1.6a | 10/10 | +10 | 10 Games |
| Patricia 4.0 JA | 9.5/10 | +9 | 10 Games |
Neural network
Obsidian evaluates positions with a neural network trained on Lc0 data.
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