Catlike Coding

Catlike Coding

AnyDice

The Pool

A Milestone in RPG Design

The Pool is a little RPG document written by James V. West. It's available online for free and is a recommended read for all RPG designers. While it may not look like much nowadays, at the time it was written it opened a lot of eyes.

The resolution mechanic is as simple as it is elegant. Roll some d6. If you rolled at least a single 1, then you succeed, otherwise you fail.

Using AnyDice, it's easy to compare the performance of different pool sizes. The transposed graph view is very useful for this.

loop DICE over {1..10} {
 output DICE d (d6 = 1) > 0 named "[DICE]d"
}
The Pool, from one to ten dice.
DiceOddsMnemonic
116.67%
230.56%
342.13%
451.77%½
559.81%
666.51%
772.09%
876.74%¾
980.62%
1083.85%