Certainly, in reality, shuffling of cards does not come down to GClub recurrence of the same movements. But even if we assume that a shuffling person (or an automatic device) makes casual movements at which there can appear with a certain probability all possible arrangements of cards in a pack at each single movement, the question of "quality" of such mixing turns out to be far from simple.
This question is especially interesting from the practical point of view that the majority of notorious crooked gamblers achieve phenomenal success using the circumstance, that seemingly "careful shuffling" of cards actually is not such!
Mathematics helps to clear a situation with regard to this issue as well. In the work "Gambling and Probability Theory" A.Reni presents mathematical calculations allowing him to draw the following practical conclusion: " If all movements of a shuffling person are casual, so, basically, while shuffling a pack there can be any substitution of cards, and if the number of such movements is large enough, reasonably it is possible to consider a pack "carefully reshuffled".
Analyzing these words, it is possible to notice, that, firstly, the conclusion about "quality" of shuffling has an essentially likelihood character ("reasonably"), and, secondly, that the number of movements should be rather large (A.Reni prefers not to consider a question of what is understood as "rather a large number"). It is clear, however, that the necessary number at least a sequence higher than those 10-25 movements usually applied in a real game situation. Besides, it is not that simple "to test" movements of a shuffling person (let alone the automatic device) for "accidence"!
Summing it all up, let's come back to a question which has been the headline of the article. Certainly, it would be reckless to think that knowledge of maths can help a gambler work out a winning strategy even in such an easy game like twenty-one. Thorp succeeded in doing it only by using imperfection (temporary!) of the then used rules.
We can also point out royal1688 casino that one shouldn't expect that maths will be able to provide a gambler at least with a nonlosing strategy. But on the other hand, understanding of mathematical aspects connected with gambling games will undoubtedly help a gambler to avoid the most unprofitable situations, in particular, not to become a victim of fraud as it takes place with the problem of "cards shuffling", for example.
Apart from that, an impossibility of creation of a winning strategy for all "cases" not in the least prevents "a mathematically advanced" gambler to choose whenever possible "the best" decision in each particular game situation and within the bounds allowed by "Dame Fortune" not only to enjoy the very process of the Game, as well as its result.
