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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.

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possible duplicate of Thoughts on Chen's formula – Radu Murzea Feb 23 at 13:53
@SoboLAN I really don't think that this is a duplicate and if you think that it is I have probably worded my question incorrectly, I did look at that question before posting this one. I am asking how the Chen formula is derived and what exactly it is saying (which would come directly from it's derivation), I am not looking some opinions of where it is useful and why its not always applicable and so on. – hmmmm Feb 23 at 14:35
@hmmmm If you could clarify the specifics of the question you're asking and then use that as the title, that would help define the usefulness of this thread. – Toby Booth♦ Feb 23 at 15:55
@TobyBooth I think my title is pretty specific, I am asking for a derivation of the Chen formula. I know that this is a poker forum not a maths forum but there is definitely a strong enough connection. I'm not hopeful of getting an answer here now, but if I find one somewhere else I will post it here – hmmmm Feb 26 at 14:13
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@TobyBooth yeah I think the word derivation is causing some problems. I am not asking how to calculate the Chen number of a specific hand, I am asking "how Chen came up with the formula" which would be some sort of game theoretic analysis (something similar to what is in his book). It is a question that is very mathematical in nature so maybe not best suited to this forum at this time (hopefully in the future). Thanks for the help anyway. If I find an answer I will come back and submit it but I appreciate that it's probably not appropriate at this time. Thanks – hmmmm Mar 1 at 22:39
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