A top tier UCI chess engine written in c++, that I started developing in april 2023.
As of 18 July 2024, Obsidian is the 3rd strongest engine at 10+1s, after Stockfish and Torch. (Ipmanchess rating 3554)
git clone https://github.com/gab8192/Obsidian
cd Obsidian
make nopgo build=ARCH
ARCH choice: native, sse2, ssse3, avx2, avx512. You can also do sse2-pext, ssse3-pext, avx2-pext. native
is recommended however.
You can remove the nopgo
flag to enable profile guided optimization.
Obsidian evaluates positions with a neural network trained on Lc0 data.