'Complementary' patterns

October 19, 2010 7:05 AM

Groups of 7- and 8-spots produce hits

In many years of playing 20-card keno, I’ve used two adjoining columns as the basis for creating my patterns or clusters.

One of the reasons is that each column has eight numbers, and I like to mark eight 7-spots in two "mirror image" configurations.

Using the last two columns as a simple example, I might mark eight 7-spots in each column, from top to bottom, for a total of 16 cards.

With the other four cards, I will usually mark two sets of 8-spot tickets consisting of the 2x4 boxes above and below the center line, and the two cross-over or "stair stepper" patterns consisting of the top four numbers on the left coupled with the bottom four numbers on the right, and its "mirror image" pattern of the bottom four numbers on the left coupled with the top four numbers on the right (see illustration).

Of course, there are probably an infinite number of ways of marking groups of eight within the last two (or any two) columns, but I’ve stuck to these patterns for simplicity and its easy to keep track of what’s hitting.

More important, I’ve found that, over the course of a playing session, the keno machine will fill in 7-of-8 numbers in at least one of the patterns.

Hopefully, it will be in the column (or pattern) in which you’ve marked the eight 7-spots, but if it’s in one of the 8-spot patterns, at least you’ve hit a nice "consolation prize" of about 1650-for-1.

I’ve never been able to predict which of the configurations will be the one that gets the 7-of-8 hits. And I’ve seldom switched patterns – such as changing from the two columns to the two cross-over patterns – in an attempt to chase the pattern that will get the hits.

Last weekend, however, I did some switching that resulted in a nice jackpot when seven of my eight numbers landed in my 7-spot cluster, giving me a payoff of 7000-for-1, plus seven 6-of-7 awards at about 400-for-1 for each.

Specifically, I had started using the cross-over patterns for my 7-spot cards, and caught a couple of 6-of-7 awards. The machine also filled in 6-of-8 a couple of times in the top and bottom boxes, but never went beyond five numbers in the two columns.

So I switched my 7-spot clusters to the two columns and, lo and behold, the machine filled in seven of my eight numbers in one of the columns.

Of course, hitting could have just been a coincidence, but it’s a strategy I’ll continue to pursue.