frtrs (pronounced “Fortress”) is a small yet strong UCI chess engine written in odin programming language and powered by a simple raylib GUI.

It started as a bet with ChlorinePentoxide, since then I’ve been working on it as a side project.

The project is seldom worked on these days and may not see light of the day until start of 2027, but this is something I have been wanting to do since years so rest assured I will finish the project someday :)

The source code is made available under the GNU AGPL license here. (Although there’s not much to see right now, it’ll improve over time)