[Rq-rules] Subskills

[Brad Furst]

On Aug 4, 2007, at 10:26 AM, Steve Davies wrote:

> ... Does anyone have a good system that they'd like to share for  
> subskills?


For impromtu situations, use squares and square roots.

For example, the character has Sneak = 49% and the character  
specializes in underground/dungeon settings, while neglecting urban  
settings and rural settings. Give the character 70% for underground/ 
dungeon settings (0.70 is the square root of 0.49), and 24% for Urban  
Sneak and 24% for Rural Sneak (0.24 is the square of 0.49).

Using the square is equal to requiring success on _both_ of two  
consecutive rolls. Use this instead, if you don't like to do the  
arithmetic.

If you don't like square roots, then another algorithm that is  
workable, similar but not the same, is to allow give two rolls and  
consider the attempt successful if either of the rolls is successful.  
(That probability is double the base skill, less the square root of  
the skill - that is, the probability of the first roll added to the  
probability of the second roll and the sum of those two reduced by  
the probability of both being successful).
__________
Brad Furst
umop ap!sdn


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