I can't figure out that Fudge dice ring.

https://s3.amazonaws.com/ksr/assets/000 … 1351032516

It has two independent spinners. The +/- spinner has a 50/50 chance of ending up on either side. The numbered spinner has it's 0,1,2,3,4 faces of varying sizes to implement the 4dF probability curve correctly. The two spinners are seperate and never touch to keep them from interfiering from one another.

OK. It just seemed odd that the 4 is half as big as the 1, the 2 and the 0.

Yeah it actually threw me off the first time I looked at it.
Theoretically zero should be the biggest and four should be the smallest per: https://en.wikipedia.org/wiki/File:FUDG … bility.svg

Its hard to tell from that one picture but I think the two is smaller than the one, and that the three should be somewhere between the size of the two and the four.

What is the mechanics of using the ring to generate a result?  E.g. do you wear it on the index finger of your left hand, touch it with your right index finger, and give a wheel-of-fortune tweak?  Or carry to the game on your finger, remove it, and spin it like a top?

I feel like one would need Bob Barker or Drew Carey to oversee each roll.

They demonstrate it in the video with a d20, but it spins wheel of fortune style. The rFudge and r% rings both get two spins. In the case of the rFudge ring it is one spin for the +/- spinner and a second spin for the 0/1/2/3/4 spinner.

Can someone help me confirm the probabilities are right here... I am a bit confused.

Here is the detailed picture they posted of the ring:

https://s3.amazonaws.com/ksr/assets/000 … 1352258622

The results of 4dF are supposed to be:

  -4       1/81        1.235 
  -3       4/81        4.938 
  -2      10/81       12.346
  -1      16/81       19.753
   0      19/81       23.457 
   1      16/81       19.753
   2      10/81       12.346
   3       4/81        4.938 
   4       1/81        1.235

A roll of 4dF is supposed to trend towards 0. 0 is its most likely outcome. Though the 1 on the ring has the highest surface area, meaning it I would think would trend towards +1/-1 ?

Nevermind I think I got it. Though ill leave the post up so people can see the photo of the distribution.