Arcane Game Lore

Notes for tonight's game: TPK!!!

Chances of Success

I was thinking today on probability of success for a die system that uses multiple of the same die. Similar to Shadowrun, World of Darkness, 7th Sea, etc, I wondered what the actual percentages were for the various polyhedrons used in gaming. So I sat down at my computer and drafted up the following chart.

I am leaning towards a multi d10 system with a 9 or 10 qualify for a success. I’m curious, based on the chart, what other people like (please no d20 requests).

# dice 1 2 3 4 5 6 7 8 9 10
d4 Chance of Success
4 25.00% 43.75% 57.81% 68.36% 76.27% 82.20% 86.65% 89.99% 92.49% 94.37%
d6 chance of success
5,6 33.33% 55.56% 70.37% 80.25% 86.83% 91.22% 94.15% 96.10% 97.40% 98.27%
6 16.67% 30.56% 42.13% 51.77% 59.81% 66.51% 72.09% 76.74% 80.62% 83.85%
d8 Chance of success
6,7,8 37.50% 60.94% 75.59% 84.74% 90.46% 94.04% 96.27% 97.67% 98.54% 99.09%
7,8 25.00% 43.75% 57.81% 68.36% 76.27% 82.20% 86.65% 89.99% 92.49% 94.37%
8 12.50% 23.44% 33.01% 41.38% 48.71% 55.12% 60.73% 65.64% 69.93% 73.69%
d10 Chance of Success
7,8,9,10 40.00% 64.00% 78.40% 87.04% 92.22% 95.33% 97.20% 98.32% 98.99% 99.40%
8,9,10 30.00% 51.00% 65.70% 75.99% 83.19% 88.24% 91.76% 94.24% 95.96% 97.18%
9,10 20.00% 36.00% 48.80% 59.04% 67.23% 73.79% 79.03% 83.22% 86.58% 89.26%
10 10.00% 19.00% 27.10% 34.39% 40.95% 46.86% 52.17% 56.95% 61.26% 65.13%
d12 Chance of Success
8,9,10,11,12 41.67% 65.97% 80.15% 88.42% 93.25% 96.06% 97.70% 98.66% 99.22% 99.54%
9,10,11,12 33.33% 55.56% 70.37% 80.25% 86.83% 91.22% 94.15% 96.10% 97.40% 98.27%
10,11,12 25.00% 43.75% 57.81% 68.36% 76.27% 82.20% 86.65% 89.99% 92.49% 94.37%
11,12 16.67% 30.56% 42.13% 51.77% 59.81% 66.51% 72.09% 76.74% 80.62% 83.85%
12 8.33% 15.97% 22.97% 29.39% 35.28% 40.67% 45.61% 50.15% 54.30% 58.11%

Categorised as: General



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