During play testing for Alton last night there were some intricate geometries presented involving single elements and Grouos, and my oppo was questioning my application of the rules - which is fine. We agreed to check with the forum.my understanding is that;
1. If the front corner of a single element is contacted by the front edge of a Group, then the element confirms into contact front edge to front edge with the element in the group it was contacted by. And
2. The front corner of a group cannot move into contact with the front edge of an element as illegal, and therefore the element does not conform into contact with the front edge of the element in the group whose corner contacted it.
About 2, it may be worth clarifying that, being illegal, the contact cannot happen at all. The group stops any point before contact at player's discretion, or does not move at all. I am saying that because of that "element in the group whose corner CONTACTED it" in the second part of your sentence.