These days I came across this post describing the Chen's formula.
The Chen formula is a system for scoring different starting hands in Texas Hold'em. It was created by Bill Chen for use in the book Hold'em Excellence by Lou Krieger. Bill Chen is also the guy that wrote The Mathematics of Poker.
The process looks a little tricky at first, but it's really quite straightforward and logical after you have worked through a handful of examples.
I wonder: what are the pros and cons of this formula? What are it's main critiques? Do you believe that consistently following the rule is a good strategy?