If card counting in blackjack is just keeping track of high cards vs low, does that mean if I could remember all the different cards used (i.e. how many 5s, how many 7s) I would be really good at blackjack?

Question

This would break online casinos because you could easily do that with electronics. Assuming the casino itself is playing fair.

If you could perfectly keep track of how many of which cards are left in the decks, and everytime make the most mathematically sound bet, would the house still have an edge?

(I assume the correct answer will start off saying I don’t understand how card counting works – fair enough, but what about the basic explanation of it did I misinterpret?)

In: Mathematics

Answer 1

Pretty sure online casinos use like 10 decks and still shuffle every few hands. That’s an exaggeration of course, but they shuffle way more often than a live casinos, and some use automated shuffle machines.

When playing blackjack, they add a card into the shoe and when it’s drawn, they re-shuffle. It’s placed really close when playing online.