yochananmarqos [1] filed a deletion request for lucaschess-git [2]: The repo is archived: https://github.com/lukasmonk/lucaschess
It's superseded by lucaschessR: https://github.com/lukasmonk/lucaschessR [1] https://aur.archlinux.org/account/yochananmarqos/ [2] https://aur.archlinux.org/pkgbase/lucaschess-git/
