Chess 3D visualizer.
On Ubuntu 21.10 and later, you can do:
sudo apt install libgtk-4-dev valac meson
On Arch Linux, you can do:
sudo pacman -S gtk4 vala meson
On Fedora 34 and later, you can do:
sudo dnf install gtk4-devel vala meson
$ meson build
$ ninja -C build
$ build/chess3d