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Parker Pages: Blackjack Main

Re: PE, BC, etc.

Posted By: Magician
Date: Tuesday, 18 November 2003, at 8:15 p.m.

[This is actually in response to Parker's post "PE, BC, etc." on Blackjack Beginners but I didn't want to cause Just Learning any more confusion.]

On Blackjack Beginners, Parker wrote:
> PE is much more complicated, since it is a
> measure of how well the system tells us to
> play each hand. Suppose that you were using
> a computer that was tracking every single
> card played as a unique value, constantly
> analysing the results, and telling us how to
> play our hand based on that data. That
> "system" would have a PE of 100.

Well, it probably should have a PE of 100% but if we used the method in TOB to do the calculation, the PE would actually be somewhat less. In fact a system of 10 side counts would have a higher PE than the computer even though it is obviously inferior. This is because Griffin used a linear approximation to calculate PE but a computer can run through all possible card combinations to come up with the exact EVs for each play.

While PE, BC and IC can give you a rough idea of the relative power of different systems, I believe the definitive way is to run a sim and compare the SCOREs.

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