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Keno or yes and blackjack insurance

8 December 2016

By John Grochowski
QUESTION: I like to take an occasional break and play keno. It is a game where I can play a quarter at a time and take a little time off. You can bet anywhere from one to 10 numbers at a time. I know the best pay tables for the number groups I play, but I do not know the intricate math to know which number group has the best payoff percentage. It seems to be 9.

ANSWER: Most video keno machines are set up so the differences in payback percentages are fairly narrow, except that you get the lowest return for picking only one number. Typically, a one-coin bet will bring a three-coin return if your number comes up. The overall return is 75%.

The percentage rises when more numbers are picked. Let's use a real world example, a machine where a pick 2 brings 15 when both numbers hit; pick 3 brings 2 for two numbers and 46 for three; pick 4 brings 2 for two, 5 for three and 91 for four; pick 5 brings 3 for three, 12 for four and 810 for five; pick 6 brings 3 for three, 4 for four, 70 for five and 1,600 for six; pick 7 brings 1 for three, 2 for four, 21 for five, 400 for six and 7,000 for seven; pick 8 brings 2 for four; 12 for five, 98 for six, 1,652 for seven and 10,000 for eight; pick 9 bring 1 for 4, 6 for 5, 44 for six, 335 for seven, 4,700 for eight and 10,000 for nine; and pick 10 brings 5 for five, 24 for six, 142 for seven, 1,000 for eight, 4,500 for nine and 10,000 for 10.

With those pay tables, payback percentages are 90.2% on the two spot, 91.6% on the three spot, 92.0% on the four spot, 91.9% on the five spot, 92.7% on the six spot, 92.4% on the seven spot, 92.3% on the eight spot, 92.0% on the nine spot and 92.6% on the 10 spot.

Note that on this machine, the paybacks are clustered around 92%, and the differences are measured in the tenths of a percent.

There are both higher and lower payers among video keno machines, but within any given machine, the payback percentages tend to be similar once you pick more than one number.


QUESTION: I was looking at some statistics on blackjack, and saw that you get a blackjack an average of once per 21 hands. So does the dealer, so the times both you and the dealer would get a blackjack are 1 in 21 times 21, or 1 in 441.

In deciding whether to insure a blackjack, do either of those numbers matter, 1 in 21 or in 441? Either way, I thought they were pretty interesting.

ANSWER: Neither is really relevant to the insurance decision. You already know you have a blackjack, so that takes care of your 1 in 21 chance. You also know the dealer has an ace up, or else insurance wouldn’t be offered. What’s relevant is the chance the dealer has a 10-value card face down. With a full deck, that’s a 30.8% chance, a figure that varies according to other cards that have been dealt.

Insurance pays 2-1, so if the you know one-third of the remaining cards are 10-values, insurance is a break even bet. With more than a third of remaining cards being 10s, insurance is a bet with a player edge. With less than a third – the standard situation – insurance favors the house and you should skip it.

This article is provided by the Frank Scoblete Network. Melissa A. Kaplan is the network's managing editor. If you would like to use this article on your website, please contact Casino City Press, the exclusive web syndication outlet for the Frank Scoblete Network. To contact Frank, please e-mail him at fscobe@optonline.net.

 

New slot machines of interest

4 December 2016
Designing slot machines is partly about designing games that are fun to play with paybacks and bonuses that occur often enough to hold your interest while also offering large enough potential jackpots for a “what if?” fantasy factor. But before players even get to the point where those elements can hold their attention, the game has to attract them to give it a try in the first place. ... (read more)
 

The new Aristocrat machines

1 December 2016
Aristocrat Technologies is proud of its Lightning Link progressive slot machines, and justifiably so. For 2016, Lightning Link was named the leading slot in North America in the annual Eilers Fantini survey, ending a five-year run at the top for IGT’s Wheel of Fortune. Following up on Lightning Link’s success, Aristocrat is introducing Dragon Link. ... (read more)
 

How the Hot Roll Works

27 November 2016
QUESTION: I played Hot Roll video poker for the first time. It was a nickel game, but I did pretty well. I had a full house with a 12x multiplier, and a four of a kind with a 5x. When I got home, I looked up what you had written about Hot Roll and you said the average roll was a 7x multiplier. Can you ... (read more)

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John Grochowski
John Grochowski is the best-selling author of The Craps Answer Book, The Slot Machine Answer Book and The Video Poker Answer Book. His weekly column is syndicated to newspapers and Web sites, and he contributes to many of the major magazines and newspapers in the gaming field, including Midwest Gaming and Travel, Slot Manager, Casino Journal, Strictly Slots and Casino Player.

Listen to John Grochowski's "Casino Answer Man" tips Tuesday through Friday at 5:18 p.m. on WLS-AM (890) in Chicago. Look for John Grochowski on Facebook and Twitter @GrochowskiJ.

John Grochowski Websites:

www.casinoanswerman.com

Books by John Grochowski:

> More Books By John Grochowski

John Grochowski
John Grochowski is the best-selling author of The Craps Answer Book, The Slot Machine Answer Book and The Video Poker Answer Book. His weekly column is syndicated to newspapers and Web sites, and he contributes to many of the major magazines and newspapers in the gaming field, including Midwest Gaming and Travel, Slot Manager, Casino Journal, Strictly Slots and Casino Player.

Listen to John Grochowski's "Casino Answer Man" tips Tuesday through Friday at 5:18 p.m. on WLS-AM (890) in Chicago. Look for John Grochowski on Facebook and Twitter @GrochowskiJ.

John Grochowski Websites:

www.casinoanswerman.com

Books by John Grochowski:

The Craps Answer Book

> More Books By John Grochowski