Blackjack 21 3 Rules
Has anybody done any work on 21+3? It seems ripe for counting. Especially with such a high payoff. A small change in the underlying probabilities should result in big player advantage. I think the count would have to be of suits though since flushes represent most of the payoff.
Anybody know of any work. I have some C++ skills, but would rather just review someone else's work than spend time reinventing the wheel.
How Does 21+3 Work In Blackjack

Blackjack 21+3 Rules
Blackjack is a popular casino game that is played between the player and the dealer. The objective is to try and beat the dealer by picking up a score of 21 on the first two cards, which is why the game is also referred to as 21. You can do this by: Scoring 21 on the first two cards dealt, as long as the dealer does not have the same hand. Examples include paying 6:5 instead of 3:2 for blackjack, limiting doubles after splits and having the dealer hit on soft 17. These unfavorable rules can easily boost the house edge to 3% or even more. With six or eight decks, getting a true count can be difficult. Contrast this with the best games.