Deeply dealt single deck is vulnerable to astute departure play. [FWIW, although I didn't know him personally, the late Stu Unger, possibly the best gin rummy player in the world, could recite the unseen cards of a standard deck by rank and suite. And he used to play at the old single deck, S17, double after split game at Caesar's.]
But all count-based, multiple deck play must involve substantial bet variation. I played mostly in the last century, and though I used to own blackjack software that would aid me in determining how extensive betting spreads need be based upon penetration, that was many hard drives ago. Even if I could find the original floppies, I have no floppy drives available to read them.
Is there available on the web, free of course, an engine of simulation or calculation or retrievable data set that can accomplish this?
Thanks in advance.