I was wondering if anyone knew how the Chen formula was mathematically derived and moreover what it is exactly that it is calculating?
I always find it very strange that it gives +2 for suited hands seeing as being suited really makes little difference percentage wise. So it gives things like:
98o=5 points 76s=6 where clearly 98o is about 59% ahead?
(this is being used as an example to show that the Chen formula does not simply measure starting hand strength in a simple way)
Thanks for any help
Note: I am not looking for opinions on whither the Chen formula is useful or why it's not applicable to every situation and should only be used as a guide to for new players to get a feel for the strength of hands and so on. I am looking for a derivation of this formula or a source where I can find the derivation of this formula, or if this is not possible (I couldn't find one, but I could have easily missed it) some insight into its derivation.
Second attempt at clarification: I am asking if anyone knows or knows of a place where I can find a mathematical derivation of the Chen formula. I am asking for something that will involve quite a lot of maths so I was really hoping more for a source.
Third Attempt at Clarification: This question is not about people thoughts on the Chen formula (as that is outside the scope of a .se account) I am specifically looking for a derivation of the Chen formula. Chen has a phd is stats so I know he did not just make this up. I am not confused by my example it is just a trivial example of why the Chen formula is not a direct hand ranking system.