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Blackjack Computer Betting Efficiency
FROM ET FAN:
Test of a Blackjack Computer's Betting EfficiencyLetter from Dr. Data Fehnworp
(From Blackjack Forum Vol. XIV #4, December 1994)
© Blackjack Forum 1994
I’ve had a hands-on demonstration of the Perfect Play Blackjack Computer advertised in recent issues of Blackjack Forum. The computer is a Z80 (old 8-bit microprocessor) on a 3 x 3 printed circuit board incased in plastic. Another chip on the board looks like it might be the voice chip. There only appears to be 16k RAM on board.
Betting Efficiency vs. Betting Correlation with the Perfect Play Blackjack Computer
Snyder Responds: It is my understanding that the Perfect Play computer uses Keith Taft’s old “David” chip, enhanced with the audio output. This computer was also bootlegged for many years under the name “Casey.” As such, its negative bet recommendations on the hands you described would be expected.
This blackjack computer was designed to play perfectly (or close to it), but bets are determined using Thorp’s Ultimate count, a single parameter point counting system described in Beat the Dealer (Random House, 1962/66). Thorp’s Ultimate count has a 100% betting correlation, but this is not the same thing as 100% betting efficiency.
No single parameter card counting system has 100% betting efficiency, and no concealable blackjack computer that I know of has ever been developed that could utilize an arbitrary subset program to analyze betting opportunities with perfect accuracy. This would be so time consuming that it is impractical. Other than for deep single-deck betting situations, it would also be pretty worthless.
Thanks for the first-hand product report.
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