Complex sentence: A group with one or no eyes will die unless its owner can develop them; conversely, a group with two or more eyes will live, since an opponent cannot remove the last liberty of the group without violating the suicide rule.
Split into simpler sentences: A group with one or no eyes will die unless its owner can develop them. Conversely, a group with two or more eyes will live, since an opponent cannot remove the last liberty of the group without violating the suicide rule.