The 2 inch chicken wire is very easy for a coon to rip apart. The 1 inch chicken wire is a little harder for them to tear apart, but if they want what is on the other side of the chicken wire, it will not stop a coon from getting in.
They will tear the wire apart. They don't care if it is where it is connected to wood or in the middle of the pen. They don't check for weak spots, they rip it apart at the spot where they want to get in at.
If roosts are next to the wire, a coon can actually get a hold of a chicken and pull it through the wire, usually in several pieces.
Many years ago, and I mean MANY years, when chicken wire was made from heavier gauge wire, it would protect your chickens from coons, but sadly those days of quality chicken wire are gone.
Jean