For a comparison between the two, see CVData/CVCX Blackjack Simulator Comparison..] On January 9, 1990, The New York Times published an article about two mathematicians, Persi Diaconis (Harvard University) and Dave Bayer (Columbia University) who have recently completed a computer study of casino-style card shuffling.Their paper proves that it takes seven riffles to "randomize" a single deck of cards.
Despite what the newspapers may have led you to believe, the latest Diaconis-Bayer paper, entitled "Trailing the Dovetail Shuffle to Its Lair," does not make any statement whatsoever regarding casino shuffles "hurting" blackjack players, nor did Diaconis and Bayer produce any data whatsoever on casino blackjack via computer simulation or mathematical analysis.
Their study also was confined only to the "riffle" shuffle.
The Diaconis-Bayer study is concerned primarily with the riffle (dovetail) shuffle's preservation of pre-shuffle "sequences" of cards.
As they put it on p.4 of their paper: "Rising sequences, the basic invariant of riffle shuffling..not intersect, so each arrangement of a deck of cards in uniquely the union of its rising sequences.
For the sake of Blackjack Forum readers who are confused about the current attention being focused on the non-random shuffle, and especially how it may affect your potential win rate, I would like to review what we know from past studies, as well as describe a few non-random computer simulations I have recently completed myself.
The first important non-random shuffle studies were conducted by Stanford Wong."The gold standard in Blackjack simulation software." - Don Schlesinger Two Blackjack Simulators join the Casino Vérité Blackjack line.CVData is described here and CVCX on the CVCX Page. What really goes on at different hand depths or counts?This is why the casinos have been continually trying to change their multiple-deck shuffle routines.This, in fact, is why fewer decks protect the casino from expert shuffle-trackers. As a matter of fact, since 1983, a sizeable amount of computer research has been done on the non-random shuffle as it I relates specifically to casino blackjack.The simple overhand shuffle has the same effect as stripping, but many players consider this shuffle amateurish.