The emphasis of the ruling is what constitutes "immediate contact" and penalizing delayed contact with an attacking player after he dumps the puck. It seems to me this was a discretionary call by the ref who ruled that Zuhlsdorf did not release "immediately". If so, then Koho's post is correct that it was a bad call. Achan "jumped" on Zuhlsdorf's shoulder and head after legal contact was made making it virtually impossible for him to "release immediately".The committee’s consensus is that defenders should be allowed to engage/bump/contact an attacking player “immediately” after the puck is released on a dump in, but players are expected to release the attacker and pursue the puck or retreat following this initial contact. The same standard would be applied regardless of whether or not the attacking player was knocked down. However, it ultimately was decided that the ‘immediacy” of the contact continues to be a determination made by the officials on a case-by-case basis.
My point on movement was there is no specific reference in the ruling on limiting any type movement by a defender, lateral or otherwise, to impede an attackers progress. Note 2 indicates defenders are allowed to "stand their ground or shadow attacking players".In interpreting this rule, a referee should make sure which of the players is the one creating the interference — often it is the action and movement of the attacking player that causes the interference since the defending players are entitled to stand their ground or shadow the attacking players.