Obsidian, an UCI chess engine written in c++
Rating Chess Engines Diary CEDR=3732
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 15 SE vs - other engines:
| Integral 7.0.0 | 26/52 | +0 | 52 Games |
| Stockfish 17 | 16.5/34 | -1 | 34 Games |
| Horsie 1.0.6 JA | 10.5/20 | +1 | 20 Games |
| YuliGM 19 | 10/20 | +0 | 20 Games |
| Yuliana 6.0 | 9/18 | +0 | 18 Games |
| SugaR AI 2.70 | 8/16 | +0 | 16 Games |
| Cool Iris 14 | 8/16 | +0 | 16 Games |
| Artemis 7TR | 8/16 | +0 | 16 Games |
| HypnoS ++ 1.02 | 8/16 | +0 | 16 Games |
| Raid 3.7 TR | 7.5/15 | +0 | 15 Games |
| SF-PRO2 05.02.2025 | 6.5/14 | -1 | 14 Games |
| Viridithas 16.0.0 | 7.5/12 | +3 | 12 Games |
| JudaS ++ 1.02 | 6/12 | +0 | 12 Games |
| Yuliana 7.0 | 6/12 | +0 | 12 Games |
| TROY 042025 | 6/12 | +0 | 12 Games |
| Dark SisTer 5.0 | 6/12 | +0 | 12 Games |
| Booot 7.4 | 6/12 | +0 | 12 Games |
| HypnoS ++ 1.01 | 6/12 | +0 | 12 Games |
| Caissa 1.21 | 6/12 | +0 | 12 Games |
| Sting Black Hole 9 | 11/11 | +11 | 11 Games |
| DON 4.5 | 5.5/10 | +1 | 10 Games |
Neural network
Obsidian evaluates positions with a neural network trained on Lc0 data.
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