This post gives a name to a very fast method of using dice that is already found in several games. It points out the similarity of the odds of this method to the even more widespread 2d6+/-modifiers method as well as current iterations of the d20 method. The familiar 2d6 method with a target of 10 Many role-playing games resolve uncertainty with 2d6 rolls and a target number of 10 for success. You add the results of two six-sided dice and add modifiers, positive or negative, and aim for a total of 10 or higher to succeed (or to succeed fully). Typically, the modifiers are equal to, or derived from, one or more character stats. There may be more modifiers, plus or minus, for situations advantageous or disadvantageous. I will call this the 2d6/target10 method. In this system, the default, when you have no modifiers, is a 1-in-6 chance of succeeding, because there’s a 1-in-6 chance of rolling 2d6 to get a total of 10 or higher. With bonuses, the odds of success increase as follows: ...
Musings on table-top role-playing games today after spending a quarter century away from them.