IHM Knowledge Center
What Is a Coach’s Challenge in Ice Hockey?
How can a coach challenge a referee’s decision in hockey, and what happens if the challenge is successful or fails?
Editor: Coach Mark • Updated: May 3, 2026
Short Answer
A coach’s challenge allows a team to request a video review of specific plays, such as offsides or goalie interference, after a goal.
Full Explanation
A coach’s challenge is a strategic tool used to question a call made on the ice.
It is most commonly used after a goal to check for offside or goalie interference.
The coach signals for a challenge, and the play is reviewed using video replay.
If the challenge is successful, the call is overturned.
If it fails, the team receives a penalty.
NHL vs IIHF Rule Differences
The NHL has a structured coach’s challenge system with specific reviewable situations.
IIHF uses video review but does not always apply the same formal challenge system.
The NHL system is more tactical and coach-driven.
Both aim to improve decision accuracy.
What Can Be Challenged
Common challenge situations include:
- Offside before a goal
- Goalie interference
Only certain plays are eligible for a coach’s challenge.
Why These Situations Are Controversial
Coach’s challenges are controversial because they can reverse goals and change momentum.
Fans often debate whether challenges are used too aggressively.
Controversy usually arises from:
- Close offside decisions
- Interpretation of interference
- Length of review
- Penalty for failed challenge
The risk factor adds tension.
Edge Case: Failed Challenge Leading to Penalty
A key edge case occurs when a coach challenges a play and loses.
In this situation, the team receives a minor penalty for delay of game.
This makes challenges a calculated risk.
Coaches must be confident before using it.
IHM Signal System: How to Read the Situation
To understand a coach’s challenge, focus on these signals:
- Trigger signal: Did a goal just occur?
- Review signal: Is the coach signaling for review?
- Risk signal: Is the situation close enough to challenge?
Trigger-level rule:
If a coach challenges and clear evidence supports the claim, the call is overturned.
If not, the team is penalized.
IHM Insight: Why This Rule Is Misunderstood
Many fans think challenges are simply a way to review any play.
In reality, they are limited and carry risk.
Coaches must balance potential reward against penalty risk.
Understanding risk vs reward is key.
Mini Q&A
What is a coach’s challenge?
A request to review a call.
What can be challenged?
Offside and goalie interference.
What happens if it succeeds?
Call is overturned.
What happens if it fails?
Penalty.
Why is it important?
Strategic decision tool.
Why This Rule Exists
The coach’s challenge system exists to reduce errors while adding a strategic layer to the game.
It balances fairness with accountability.
Key Takeaways
- Allows review of key plays
- Used mainly after goals
- Successful challenges overturn calls
- Failed challenges result in penalties
- Strategic and high-risk tool