Checking (ice hockey) - Wikipedia
https://en.wikipedia.org/wiki/Checking_(ice_hockey)Charging, hitting from behind and boardingare examples of illegal hits. Charging shall mean the actions of a player who, as a result of distance traveled, shall violently check an opponent in any manner. A “charge” may be the result of a check into the boards, into the goal frame or in open ice". Boarding is when a check violently throws a defenseless player into the boards. Due to their dangerous nature and increased likelihood of causing serious injury, these hits can have penalti…