Dredging this thread back up after 20 years - have any updates been made to the rules since then or is this still a grey area?
Asking because it happened during a match yesterday. Both of us are seasoned players and we also had a touring pro, Boris Ivanovski, around us but we didn't really come up with a conclusion other than that it's a grey area. We were going to ask John Leyman his opinion next time we saw him, but I figured I'd ask AzB first.
Screenshot 1 - this was basically the situation in our match (other balls not shown for simplicity). My opponent purposefully pushed through the 7 to break up the dead combo. Legality here seems like a grey area.
Screenshot 2 - what if he pushed through the 7/8 cluster here? That oddly seems less legal.
Screenshot 3 - what if he pushes through with a super long follow through? Or intentionally miscues and scoop jumps over the cluster? Seems definitely not legal.
Screenshot 4 - what if he taps the cueball to reposition it and hits it again while it's moving to break up the cluster? Not legal without doubt.