An official NHL (National Hockey League) rink is feet long and 85 feet wide; Don't pass over two lines; that's against the rules, and the official will blow the. A basic guide for rules in the NHL Covers everything from the field of play to stoppages and penalties. Basic Rules of Hockey. BASIC RULES OF ICE HOCKEY. The objective of hockey is to score more goals than your opponent on their goaltender and to have fun!.