Frozen Four FAQ: Everything you need to know about college hockey's main event

The Frozen Four kicks off on Thursday night in St. Paul -- starting with the first semifinal game between Ohio State and Minnesota-Duluth -- and it's shaping up to be a great hockey weekend. Haven't followed college hockey this season (or much at all)? Don't sweat it. ESPN has you covered. Here's a primer, including some commonly asked questions, so you can skate up to speed in time for puck drop.

Are the rules the same as the NHL?

Mostly. You'll notice a few key differences. All college hockey players are required to wear a face mask or shield. Fighting is a no-no; it is penalized with a five-minute major and the offender is ejected from the game -- and must sit for the next game too. Hand…