IHM Knowledge Center
What Is Delay of Game for Puck Over the Glass in Ice Hockey?
Why is it a penalty when a player shoots the puck over the glass, and what determines whether the call is automatic?
Editor: Coach Mark • Updated: May 3, 2026
Short Answer
A delay of game penalty is called when a player shoots the puck directly over the glass from their defensive zone without it touching anything.
Full Explanation
This rule is designed to prevent players from intentionally stopping play under pressure.
If a player sends the puck out of play over the glass from their defensive zone, it results in an automatic minor penalty.
The puck must go directly out without deflection.
The rule applies even if the action was unintentional.
NHL vs IIHF Rule Differences
Both NHL and IIHF enforce delay of game penalties for puck-over-glass situations.
The NHL applies the rule strictly as an automatic penalty.
IIHF rules are very similar but may involve slight differences in interpretation.
The core concept is consistent.
When the Penalty Is Called
A delay of game penalty is called when:
- The puck is shot from the defensive zone
- It goes directly over the glass
- It does not touch any player or surface
This results in a 2-minute minor penalty.
When It Is Not a Penalty
No penalty is called when:
- The puck deflects off a stick or player
- The puck is shot from outside the defensive zone
- The puck hits the glass before going out
These exceptions are important.
Why These Situations Are Controversial
Puck-over-glass penalties are controversial because they are automatic and do not consider intent.
Fans often feel the punishment is too harsh for accidental plays.
Controversy usually arises from:
- Unintentional clears
- Game pressure situations
- Strict enforcement
- Impact on game momentum
These penalties can change the outcome of games.
Edge Case: Puck Slightly Deflects Before Going Out
A key edge case occurs when the puck makes slight contact before leaving the rink.
Even a small deflection off a stick or body cancels the penalty.
Officials must carefully observe the puck’s path.
Small details determine the call.
IHM Signal System: How to Read the Situation
To evaluate puck-over-glass situations, focus on these signals:
- Zone signal: Where was the puck shot from?
- Trajectory signal: Did it go directly out?
- Contact signal: Was there any deflection?
Trigger-level rule:
If the puck is shot directly out of play from the defensive zone without contact, a penalty is almost always called.
If there is any deflection, the penalty is waived.
IHM Insight: Why This Rule Is Misunderstood
Many fans think intent should matter in this rule.
In reality, the rule is purely based on outcome, not intention.
This makes it one of the strictest rules in hockey.
Understanding automatic vs subjective calls is key.
Mini Q&A
What is delay of game for puck over glass?
A penalty for shooting the puck out from the defensive zone.
Is intent considered?
No.
What cancels the penalty?
Any deflection.
How long is the penalty?
2 minutes.
Why is it important?
Prevents intentional stoppages.
Why This Rule Exists
This rule exists to prevent players from relieving pressure by intentionally stopping play.
It keeps the game fast and continuous.
Key Takeaways
- Automatic 2-minute penalty
- Applies in defensive zone
- No intent required
- Deflection cancels call
- Prevents game delay