Bonus Spot Keno Introduction & Analysis

Bonus Spot Keno is a keno variation that works similarly to traditional keno, except that the player is paid more if the first number he picks matches a ball draw.

Rules of Bonus Spot Keno

• The player selects two to ten numbers from a range of one to eighty.
• The "Bonus Spot" will be the first number selected, but the player can adjust one of his other options to the Bonus Spot by pressing the button.
• The game will draw 20 numbers from 1 to 80 at random.
• The player will be compensated in part based on how many of his selected numbers fit the game's 20-ball draw.
• If the Bonus Spot matches one of the game's 20 numbers, the player will be paid according to the Bonus Spot paytable. Otherwise, he'll be charged according to the Standard paytable, which pays out the same amount for any win.

Analysis
The pay tables below are from the Rampart casino's 5-cent game. The Standard paytable is the first, and the Bonus pay table is the second.


After considering the likelihood of matching the Bonus Spot, the weighted average win for each number of picks and catches is shown in the table below.

The chance of each combination of picks and catches is shown in the table below.

The final table, which is the product of the likelihood and weighted average win tables above, indicates the contribution to the return of each combination of picks and catches. The total return is shown in the bottom row.