Dan Rosen of NHL.com answered a few questions today.

Can we review the new rules governing coach's challenges applied to the upcoming season?

The first notable change is the addition of a third category to allow a coach to challenge a missed stoppage of play in the offensive zone that leads to a goal. A coach already was permitted to challenge for goalie interference and offside. The point of the new challenge category is to give a coach a chance to have the NHL review and potentially overturn a goal scored after the puck hits the protective spectator netting, after it's illegally high-sticked to a teammate in the offensive zone, after a hand pass in the offensive zone, etc. The goal is reviewable provided the puck stays in the offensive zone after the infraction takes place. NHL Deputy Commissioner Bill Daly said these are black-and-white calls that are determined conclusively by video review, which is why the League felt comfortable adding this category.

The other change is significant: A minor penalty for delay of game will be assessed for any failed coach's challenge, and any subsequent failed challenge will result in a double-minor for delay of game. The former rule allowed for a delay of game minor to be assessed only for a failed challenge for offside. Now any failed challenge will be penalized. NHL Commissioner Gary Bettman said the theory is that the League doesn't want an abundance of challenges, so including something as punitive as a delay of game penalty should hopefully limit the amount of 50/50 challenges.

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