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For questions primarily about dice themselves: polyhedral solids used to generate random numbers. In tabletop RPGs, dice are the most common means of introducing chance into the proceedings. Many players enjoy collecting dice of varying colors and shapes.

19 votes
Accepted

I need a 'standard array' for a D&D-like homebrew game, but anydice chokes - how to proceed?

Unfortunately, for large dice, the number of possible multisets can grow quite quickly---in this case, \$\Theta \left( n^{12} \right)\$ where \$n\$ is the number of scores. … If you would like to know more, you can read my paper on the subject: @inproceedings{liu2022icepool, title={Icepool: Efficient Computation of Dice Pool Probabilities}, author={Albert Julius Liu …
HighDiceRoller's user avatar
10 votes

How can I map a single d20 to a number of hits? (use case: Animate Objects)

The sum of dice also converges to a normal distribution. Therefore, we can try using the margin of success as the number of hits. …
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9 votes

Are there any role-playing games which use dice larger than a d100?

d1000 In a brief search I found the following: Here's a forum post including images of a Games Workshop publication using the d1000. The d1000 MUTATION TABLE! is simultaneously everything that was ri …
HighDiceRoller's user avatar
9 votes

Do you know the angles of a face for a 7 or 14 sided die?

Goodman Games' Dungeon Crawl Classics dice. Long dice that are unstable on their ends. Teetotums are similar. …
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9 votes
Accepted

How to calculate advantage/disadvantage with multiple dice (e.g. 3d6, 2d10, etc.)

Approaches of this type have been proposed on StackExchange, with examples including: Formula for dropping dice (non-brute force) Generating Function for sum of N dice [or other multinomial distribution … Examples include: Roll and Keep in Anydice How to calculate the probabilities for eliminative dice pools (dice cancelling mechanic) in Neon City Overdrive? …
HighDiceRoller's user avatar
7 votes

Discord DiceParser (By RoliSteam/KDE?): ceil() function syntax needed (need to "round up" an...

following identity: $$ \left\lceil \frac{n}{d} \right\rceil = \left\lfloor \frac{n + d - 1}{d} \right\rfloor $$ In this case the numerator \$n\$ is the sum rolled on the 4d4 and \$d\$ is the number of dice … As for "scalar" they probably mean a result that is a single number (e.g. the sum of some dice), as opposed to a list of individual die rolls. …
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6 votes

What are the odds of rolling high all the time?

Each of those dice has a 9/20 chance of rolling below a 10. Do a little binomial theorem and we get an 84.7% chance of at most 4 of those dice rolling below a 10. … The most likely case is that exactly 10 out of 17 dice rolled 15+, in which case none of the remaining dice rolled 15+, effectively reducing the d20 to a d14 for those remaining dice. …
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6 votes

Is there a standard d10 dimension ratio?

According to this MathExchange answer, the 90-degree configuration of a pentagonal trapezohedron has the additional property that the angle between a face and the opposite edge on a vertex is also 90 …
HighDiceRoller's user avatar
6 votes
Accepted

How can I get this explode function in AnyDice to work?

set "maximum function depth" to 10 function: cascading X:n MAX:n { if MAX <= 4 | X < MAX { result: X } else { result: X + [cascading d(MAX-2) MAX-2] } } function: cascading D:d { result: [c …
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5 votes

Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers)

@ die + max(n - 12, 0) @ extra result = raw.map(score) print(result) for triggers in [4, 3, 2, 1, 0]: area(result.map(lambda s, t, b: s if t >= triggers and not b else -1), f'{n} dice … : +{triggers}') output(result.map(lambda s, t, b: s if b else 100), f'{n} dice: clean') limit(0, 5) degenesis(5) The dice have vector values, represented by tuples (4+s, 6s, 1s). …
HighDiceRoller's user avatar
5 votes

Help with "Roll XD12, and keep each middle dice as an individual result"

Adding the middle dice together If you just want to add the middle dice together, you can use the @ operator to select individual sorted positions and add them together: output {2..4}@5d12 Or, perhaps … , rather than 3 values for the individual dice. …
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5 votes
Accepted

Help with counting successes with multiple target numbers

If we sort the dice from highest to lowest, and we observed that the player's \$i\$th roll (starting from \$i = 1\$) rolled \$x\$, then we know that all \$i\$ rolls up to that point rolled at least \$x … (Presumably the player automatically fails if they have fewer dice than the obstacle.) …
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3 votes
Accepted

Anydice: two-colored polyhedral dice pool

Mixing different dice also makes things much more difficult. … Fortunately, it turns out that, as long as you can express the dice mechanic in terms of an incremental calculation where you're told how many dice rolled each number in each pool for one number at a time …
HighDiceRoller's user avatar
3 votes
Accepted

Anydice: a pool where stress dice cancel out action dice of equal or lower value and return ...

# action_set: The set of surviving action dice. # leftover_stress: The number of surviving stress dice that rolled # this number or higher. … : 6, 3, 3") but the number of possible such sets grows rapidly with number of action dice (e.g. this example results in 252 rows), so I won't reproduce the table here. …
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3 votes

Dice rolling mechanic where modifiers have a predictable and consistent effect on difficulty

Compared to an ideal Laplace distribution: Opposed step dice In this type of system, instead of adding a modifier to their roll, the two sides use larger and larger dice as they advance. … Proof Suppose two players roll step dice against each other, with respective sizes \$A\$ and \$B\$, with ties being broken by coin flip. …
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