In the middle of this past week, the National Hockey League made three changes to their rules for the 2017-18 season. Scouting the Refs has a breakdown; I’ll summarize the first two. The first is a big one: coaches’ challenges for goals due to offside play will charge a team with a minor penalty if they are wrong. They’ll still have a timeout, they would just be down a man if their challenge failed - meaning they’ll be on a penalty kill after conceding a goal. The second is that a puck played with a high stick will result in a neutral zone faceoff nearest to where the puck was played.