Ok, I figured out what 5min means, but what is 5|2?
Resolved: Blitz rules: 5|2, etc?

I think you've got the point of what the 5 is, as I also have.
My guess is "/2" stands for the two people (you and me) who don't know what the meaning of the expression 5/2 is
Ok, I figured out what 5min means, but what is 5|2?