Professional Blackjack

**BetWise21** · 11-07-2020, 01:52 PM

Did Stanford Wong go from rounding or truncating in his first book to flooring for index calculation or the other way around? What was the true count calculation method in the first book and then the second?

**bigplayer** · 11-07-2020, 03:40 PM

Truncating to Flooring so the positive indexes didn't change. Negative indexes decreased. So -1.7 became -2 (floor) instead of -1 (truncated).

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**BetWise21** · 11-07-2020, 04:43 PM

I understand that. The question was what method Wong used from one publishing to another.

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**bigplayer** · 11-07-2020, 04:56 PM

Answered above. It was Truncating and changed to Flooring it what my understanding was.

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**BetWise21** · 11-07-2020, 04:59 PM

You did, my apologies, I did not read it correctly. I agree that was my understanding that his original was not flooring and the second publishing was flooring and is currently the most popular method

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**Chaconne** · 11-07-2020, 07:06 PM

Originally Posted by bigplayer

Answered above. It was Truncating and changed to Flooring it what my understanding was.

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It's the other way. The 1994 edition switched to truncating and the index tables were adjusted accordingly: From page 37 of the latest edition of Professional Blackjack: "You should truncate, and not round, when using these tables." From page 254: "These tables differ from earlier editions of this book. The change was increasing all the negative numbers by 1 because in the 1981 and earlier editions of Professional Blackjack, strategy numbers were presented using a different assumption as to how to round count per deck."

**DSchles** · 11-07-2020, 08:54 PM

Originally Posted by Chaconne

It's the other way. The 1994 edition switched to truncating and the index tables were adjusted accordingly: From page 37 of the latest edition of Professional Blackjack: "You should truncate, and not round, when using these tables." From page 254: "These tables differ from earlier editions of this book. The change was increasing all the negative numbers by 1 because in the 1981 and earlier editions of Professional Blackjack, strategy numbers were presented using a different assumption as to how to round count per deck."

Yes, that's right. Went from flooring to truncating. I begged him not to. Drove half of the BJ community crazy for years.

Don