what is DI ?

[BradRod]

I am reading Andersen - Burning the Tables in Las Vegas. I was searching messages to see what discussion there has been about the book and came upon this from ZG

>>>>>>IA's gambit creates a very poor DI and SCORE and is NOT for small stakes play in any event...<<<<<<<.

What are DI and SCORE ?

Thanks,

BradRod

 

[Adam N. Subtractum]

DI & SCORE...factoring risk into the equation...

I believe both of these terms were coined by Donald Schlesinger in his "Blackjack Attack", don't qoute me though.

DI = 1000 * (win rate / standard deviation)

SCORE = (win rate / standard deviation) ^ 2

These ratings allow a fair comparo of different games by taking variance into consideration, and not just advantage, which is a poor "measuring stick" for making comparisons.

Another effective method is ROI, or return on investment (used extensively by T-hopper), which divides gains by the bankroll required for a specified amount of risk.

ROI = win rate / bankroll required for n% RoR

The importance of risk cannot be overstated, and it needs to be factored in when making any kind of comparison.

ANS

 

[Rob McGarvey]

What's The Score?

Did you know that blackjack has a score? Dealer 4, you 5? Not that kind of score! Don Schlesinger's SCORE is considered the "gold standard" for comparing various blackjack games. S-tandardized C-omparision O-f R-isk and E-xpectation. Using the High Low count, these are the numbers that were produced using the best games found in Las Vegas last month:

Fine Tuner's February LV SCOREs - LAS VEGAS CASINO RATINGS

FEBRUARY 2002*

*Assumes $10k BR/bets optimized/CBJN data
Spreads - 1D 1-4, 2D 1-2x4, 6-8D 1-2x4 (wonging only)

Lady Luck 1 deck 92.99
Treasure Island 2d S17 84.59
Flamingo 6 deck 70.67
Riviera 2 deck 68.03
Mirage 2 deck 68.03
Bellagio 2 deck 68.03
Horseshoe 2 deck 65.77
Lady Luck 2 deck 65.77
Treasure Island 2d H17 65.68
Palms 6 deck H17 59.80
Texas Station 2 deck 58.74
Venetian 2 deck 58.74
Mandalay Bay 2 deck 58.74
MGM 6 deck S17 55.82
Ballys 6 deck 55.82
Bellagio 6 deck 55.82
Mirage 6 deck 55.82
Treasure Island 6d S17 55.82
NYNY 6 deck H17 54.37
Plaza 6 deck 52.89
Caesars 6 deck S17 51.82
Casino Royale 2 deck 51.54
Eldorado 2 deck 51.54
Flamingo 2 deck 51.54
Wildfire 2 deck 51.54
Terrible' s 2 deck 51.54
Palms 2 deck 51.47

Using a more advanced count will give better numbers than those above. Hi Opt II, AO II, Zen, UAPC, or RAPC will increase these numbers.

 

[BradRod]

WOW ! 39 Hits and No Answer

 

[LV Bear]

DI and SCORE *LINK*

From the BJ Glossary at BJ21.com:

Desirability Index. A term coined by Don Schlesinger in his book Blackjack Attack. It is a number derived by dividing the win rate by the standard deviation for the particular game being examined and multiplying the result by 100. The lowest desirability index number given in Schlesinger's book is -0.52 and the highest is 16.04. The higher the number, the better the game. In general terms, a player would look for a desirability index of 6.6 or higher to find game which would be considered to be playable to most counters.

See Blackjack Attack for further discussion of DI and SCORE.

 

[BradRod]

Thanks

 

[Rob McGarvey]

Re: WOW ! 39 Hits and No Answer

I replied LONG ago, but my posts are moderated and the Mayor is away, probably playing BJ. Sorry! You can always post at the Card Counters Cafe where I can respond instantly to any questions.