DMMike

10-16-2014, 11:55 AM

I was traveling recently, and asked myself, "how can I roll dice when I have no dice or no place to roll them?" Case in point: being in a car makes for a horrible gaming table, but a captive audience.

Wanting to go one step further than paper-rock-scissors, I came up with this:

1. GM and player pick any number from 1 to 20.

2. Player announces number, and GM adds it to his number.

3. The result is a d20 roll, unless it's over 20. Then subtract 20 to get result.

For example:

GM selection

Player selection

Result

13

11

4

9

4

13

14

6

20

Does this provide even odds for any number, 1-20? (Assuming the two number selections are random enough!)

Can the same be done with other "dice?"

Wanting to go one step further than paper-rock-scissors, I came up with this:

1. GM and player pick any number from 1 to 20.

2. Player announces number, and GM adds it to his number.

3. The result is a d20 roll, unless it's over 20. Then subtract 20 to get result.

For example:

GM selection

Player selection

Result

13

11

4

9

4

13

14

6

20

Does this provide even odds for any number, 1-20? (Assuming the two number selections are random enough!)

Can the same be done with other "dice?"