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Old 08-14-2012, 12:12 PM
Michael Lewis Michael Lewis is offline
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Default 2013 dice percentages?

Does anyone know the dice percentages for rolling on a D20 using multiple dice? I've played GURPS and understand the bell curve and the percentages of rolling what. The D20 gives a 5% increment. But what about being able to roll multiple dice?


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Old 08-14-2012, 12:33 PM
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Cdnwolf Cdnwolf is offline
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Sometimes, simple success or failure doesn’t provide enough detail - you need to know how thoroughly you succeeded or how catastrophically you failed. In such instances, the relevant value is the difference between your TN and your die result. This is referred to as the margin of success (MoS) or margin of failure (MoF).
Example: Bob has a TN of 6. He rolls, achieving a die result of 1. Bob succeeds with a margin of success of 5.
A MoS of zero (i.e. a die result equal to your TN) indicates that you barely succeeded, snatching victory from the jaws of defeat.
Optional Rule: Exceptional Success
If more than one die result could be a success, use the lowest result to determine your base MoS. Then increase your MoS by 2 for each additional successful die.
Example: Bob rolls 3d20 against a TN of 6, with die results of 1, 5, and 18. His MoS is 7: a base of 20, 5 for the die result of 1, +2 for the die that came up 5.

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Old 08-14-2012, 04:14 PM
alexei alexei is online now
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I will try to attach a D20 probability chart I got from somewhere. I think this is what you are asking about.
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File Type: doc probabilty.doc (76.0 KB, 123 views)
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Old 08-14-2012, 07:31 PM
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Here are the success probability chart and graph I salvaged from the old 93GS forums. I think this is what you're looking for.

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Old 08-14-2012, 07:36 PM
Michael Lewis Michael Lewis is offline
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That's it. Thanks so much.
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