Understanding when and how to challenge a play is an important part of hockey for coaches, players, and parents alike. Coach's challenges have become a significant strategic element in the modern game.Here's what you need to know about challenging plays:The coach's challenge system allows teams to request a video review of certain types of plays. In the NHL, challenges can be made for goaltender interference, offside on a goal, and missed stoppages. Each league has its own specific rules about what can be challenged.Timing is critical. Challenges must be made immediately after the play in question. Once the puck is dropped for the next faceoff, the opportunity to challenge is lost. Coaches need to be prepared to make quick decisions.Understanding the rules is essential. A successful challenge can overturn a goal or restore one that was waived off. However, failed challenges often come with penalties, such as a delay of game minor or loss of timeout. This risk-reward dynamic makes challenges a strategic decision.