We had an interesting trivia question on HF Sportsbook last night concerning this.
For nearly 70 years the NHL painted the Red Line in a combination of the colors red and white because of black and white television.
In recent years several NHL rinks have elected to paint a solid Red Line.
The answer is 4
source FF | Center Ice
The Bruins were the first to do so in 2015.
Obviously black and white television is no longer a factor but according to the 2018-19 NHL Rulebook the center line should have a distinctive pattern.
http://www.nhl.com/nhl/en/v3/ext/rules/2018-2019-NHL-rulebook.pdf
Can you imagine the fun if a visiting coach playing in Boston, Sunrise, St. Louis or Vancouver signals the officials and demands a penalty over an illegal player surface?
It is in the rulebook
In recent years several NHL rinks have elected to paint a solid Red Line.
The answer is 4
source FF | Center Ice
The Bruins were the first to do so in 2015.
Obviously black and white television is no longer a factor but according to the 2018-19 NHL Rulebook the center line should have a distinctive pattern.
http://www.nhl.com/nhl/en/v3/ext/rules/2018-2019-NHL-rulebook.pdf
Can you imagine the fun if a visiting coach playing in Boston, Sunrise, St. Louis or Vancouver signals the officials and demands a penalty over an illegal player surface?
It is in the rulebook