Originally Posted by Grindabod
I see your point Big.
The thing is that mathematically it seems to me that it would make more sense to add a few numbers rather than subtracting, but hey ho. As you say it is mostly guesswork anyway and point taken.
I guess Im just one of these guys with autistic tendensies that needs to know
I totally understand that, and tbh, I'm kind-of surprised no one on here has the absolute, definitive answer. I guess Arj's response may be the best/closest response you'll get, but I really don't think that the need to discount outs is why the formula needs to be altered. I read a detailed explaination of it somewhere, but it's been years and years ago. I believe it was in one of Harrington's books, but I can't swear to that.
So while it may be mildly interesting to know the "why", imo, I still think it's not all that important. Especially when multi-tabling, you just need a quick approximation to get you close quickly so that you can make your choice and move on to the next table awaiting action.
We do have a few "math guys" on here, though, and frankly I thought they be all over this. Guess not. So, as a non-math person, I'm content with the approximation. I always hate to send people elsewhere, but I guess if you really need to know; try Googling it, or head over to 2p2 and try your luck there.