/usr/share/man/man6/ace-mastermind.6.gz is in ace-of-penguins 1.5~rc2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man6/ace-of-penguins.6.gz
/usr/share/man/man6/ace-of-penguins.6.gz