One of my informal rules for this blog is that I don’t consider ordinary blackjack card counting (BJCC). Any easy Google search reveals myriad resources that give the minutia of every aspect of BJCC. At least three generations of APs have dedicated themselves to this game. For my purposes, the question is: how does BJCC stack up against card counting blackjack side bets? In order to answer this, an analysis of BJCC using parameters similar to those used for blackjack side bets was conducted. This post gives the details of this comparative analysis.

One way to view BJCC is that the main game of “blackjack” is its own side bet. In this case we imagine a player who is watching a table with one player on it, and whenever the count hits the trigger, he wagers $100 behind the player on the table. In its pure form, this is the most direct comparison. The AP is either wagering $0 or $100 on BJCC.

In practice, blackjack-as-a-side-bet does not happen. Therefore, I also analyzed the case when the player wagers $5 below the trigger count and then makes an additional $95 wager on "blackjack" when the count is at +1 or above. In other words, this AP is spreading $5 to $100.

For an AP with a maximum bet of $100, these two methods of play will generate the maximum profit possible for the AP, regardless of the counting system he uses or the number of indices he uses. This is the "binary" approach. Either bet $0/$100, or bet (table minimum)/$100.  No bet ramp. No Kelly. No ROR. Just pure profit-potential.

There is some comedy to this analysis. Any pit boss who can butter toast would pick out an AP spreading from $5 to $100 before the butter began to melt. Meanwhile, no AP would spread his bets this way as an ordinary card counter, both for bankroll reasons and for cover reasons. Still, when APs play against blackjack side bets, they are “spreading” from $0 to $100, and doing so without care or cover. A true comparison demands this exaggeration.

In this analysis, I assumed the player was using the High-Low card counting system and all available card-counting indices for varying his play. This is a perfect counter. He knows everything about High-Low.

I assumed that the blackjack rules were standard:

  • Six decks, cut card placed 52 cards from the end
  • Dealer hits soft 17
  • Player can double on any first two cards
  • Player can double after split
  • Split aces receive one card each

I asked the acclaimed blackjack analysis expert Norm Wattenberger for help with the analysis of BJCC. He generously agreed. Norm’s software, Casino Verite,  has long been the top product on the market for evaluating various approaches to BJCC. Norm ran a simulation of 210,108,096 six-deck shoes for me. I used Norm’s data to cull the comparative results for BJCC vs. side bets.

The full data Norm provided to me is available here:

BJCC_12_03_01

The following table gives the analysis of the “blackjack-is-a-side-bet” AP. This is the AP who is watching a table with one player on it, and whenever the count hits the trigger, he wagers $100 behind the player on the table, otherwise he makes no wager.

blackjack card counting 6 Decks H17 DOA DAS

To get the net win for the AP who is using the “play-all” approach, it is sufficient to quantify the hands where the house has the edge and subtract. The following table gives details of the hands where the house has the edge and the AP is wagering $5 per hand:

Blackjack card counting 6 decks H17 DOA DAS

The following table summarizes the net win for the play-all AP. These values are obtained by combining the results from the two tables above:

blackjack card counting 6 decks H17 DOA DAS

In summary,

  • The “blackjack-is-a-side-bet” AP is earning $33.58 per 100 hands.
  • The “play-all” AP is earning $29.37 per 100 hands.

These amounts are the maximum earnings possible for a card counter using the High-Low system. There is simply no way to earn more with a maximum wager of $100 from BJCC. This leads to an extremely useful result for the game protection community.

Theorem Assume an ordinary blackjack card counter using High-Low. The game is standard, 6D, H17, DOA, DAS. The cut card is set at 52 cards. If the AP’s maximum wager is $Z, then the AP’s maximum win rate is:

Maximum win rate = $33.58 x (Z/100), per 100 hands.

For example, if a suspected card counter is making a $2,000 maximum wager, then his maximum win rate is:

$33.58 x (2000/100) = $671.60, per 100 hands.

The following table gives comparative win-rates for BJCC and the side bets I’ve analyzed in this blog to date.

comparison of blackjack wagers 6D

Note that BJCC has the lowest average edge of all the wagers given in this table. On the other hand, BJCC is second only to the highly crushable Slingo wager in its bet frequency.  Every other wager in this table has a lower bet frequency and higher average edge. This underscores the high volatility the ordinary card counter experiences: a high frequency of wagers with a razor-thin edge

The results in this table are the best possible for BJCC. In practice, the AP will earn at a substantially lower rate. It is immediately clear that BJCC is, at best, a mediocre opportunity for the AP.

Many thanks to Norm Wattenberger for his help.

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received his Ph.D. in Mathematics from the University of Arizona in 1983. Eliot has been a Professor of both Mathematics and Computer Science. Eliot retired from academia in 2009. Eliot Jacobson