Reading a d3

Post/Author/DateTimePost
#1

The_White_Sorcerer

Mar 23, 2015 0:33:37

As I understand it, the standard method for rolling a d3 is to roll a d6 and read it thusly:

1-2=1

3-4=2

5-6=3

 

My question is, how on Earth did this insane method ever become standard? I for one refuse to use it, instead preferring to read 1-3 as is and subtracting three from 4-6.

 

Discuss.

#2

CCS

Mar 23, 2015 0:44:03
I would imagine that "insane" method came from applying what we learned in grade school and simply reading the D6 in equel thirds....
#3

Reius

Mar 23, 2015 1:05:30

Both those methods are completely insane and overly complicated. The obvious answer is to roll three sets of percentile dice of different colours. Assign the values 1, 2 and 3 to the different colours. Whichever set rolls highest gives you the result of your d3. Simple, quick, and so easy even a baby could figure it out.

#4

Vahnyu

Mar 23, 2015 3:13:50

Roundup[1d6 / 2].

Roundup[1/2]=Roundup[0.5]=1

Roundup[2/2]=Roundup[1]=1

Roundup[3/2]=Roundup[1.5]=2

Roundup[5/2]=Roundup[2.5]=3

Roundup[6/2]=Roundup[3]=3

 

 

 

 

Another way you could do a 1d3 would be to roll 1d4, and reroll all 4s.

 

The generalised way to roll any 1dy would be to roll 1d(10 * z), and reroll all results that are equal to y+1 or more. z is the number of decimal digits found in y. Thus, to roll a 43, you'd generally need to roll 1d100 (roll 2 1d10s, 1d10 for the 10s and 1d10 for the 1s) and reroll all results that are higher than 1d43 (reroll all 1d10s that are higher than 4 for the 10s, and if the 1d10 for the 10s turned exactly 4, then reroll all 1d10s that are higher than 3 for the 1s).

#5

BoldItalic

Mar 23, 2015 3:54:29

Assuming that the d6 is "fair", with opposite faces adding up to 7, the "fair" way to convert is:

 

1 or 6 becomes 1
2 or 5 becomes 2
3 or 4 becomes 3

This ensures that at each of the 8 corners of the die, there is a "1", a "2" and a "3", so all corners are equal.

 

The rule is: "If the roll is 1, 2 or 3, keep it. If the roll is 4. 5. or 6, subtract it from 7."

 

And, no, I don't do it that way, either.

#6

AaronOfBarbaria

Mar 23, 2015 4:28:02

I just read whatever number is on the top ridge of my d3... don't know why people bother with all this roll a d6 and do math business.

#7

Torg_Smith

Mar 23, 2015 5:13:34

Personally, I don’t think the d12 gets enough love. Roll a d12 and 1-4 = 1; 5-8 = 2; 9-12 = 3. Show your love for d12s.

#8

mellored

Mar 23, 2015 5:29:34

It came from simple division.

 

1d6 / 2 (round up).

 

Though cycling works too.

1d6 base 3.

 

 

I switch between the 2 methods and can't decide which i like better.  (using a d8, since i lost my d4).

#9

IxidorRS

Mar 23, 2015 7:51:31

I just say, "Let's not have D3s."

#10

Wuzzard

Mar 23, 2015 8:05:24

I use d20. 

 

1-3 use that number

4-20 roll again

 

It takes a while sometimes, but I at least I don't have to use any math.

#11

Matau99

Mar 23, 2015 8:11:43

Wuzzard wrote:
#12

Wuzzard

Mar 23, 2015 8:16:53

Matau99 wrote:
#13

ChrisCarlson

Mar 23, 2015 8:18:25

I use a d5 (roll a d10 and divide by 2), and just reroll results greater than 3.

#14

Matau99

Mar 23, 2015 8:26:38

Wuzzard wrote:
#15

Xaspian

Mar 23, 2015 11:50:50

ChrisCarlson wrote:
#16

Coredump00

Mar 23, 2015 12:57:18

Okay, I can't think of anything funny, so on a more serious note.

 

One of our players has a couple of "d12's" that are actually a D3 and a D4.  Kinda clever... (The D3 has 12 sides, 1 2 3 1 2 3 1 2 3 1 2 3)

#17

ChrisCarlson

Mar 23, 2015 13:03:50

I have a few "blank" white d12s. I use a permanent marker, to write whatever I want on each side, to make my own dice. I think i'll do that.

 

Once each, on three of the sides, I'll write a "1", a "2" and a "3". Then on the remaining nine sides I'll write "REROLL".

 

Brilliant idea! Thanks!

(Reply to #17)

Coredump00

ChrisCarlson wrote:
#19

BoldItalic

Mar 23, 2015 14:31:10

You could roll 2d6 and use this look-up table:

 

Roll:   2  3  4  5  6  7  8  9 10 11 12
        ===============================
Result: 3  1  2  3  1  2  3  1  2  3  1

The probabilities work out right. If you like formulae, it's (2d6 mod 3)+1

 

Why roll two dice when you could just roll one? Because it feels more random.

#20

Wuzzard

Mar 23, 2015 14:32:07

Matau99 wrote:
#21

ChrisCarlson

Mar 23, 2015 15:10:22

BoldItalic wrote:
#22

ChrisCarlson

Mar 23, 2015 14:48:29

Coredump00 wrote:
#23

BoldItalic

Mar 23, 2015 15:16:59

ChrisCarlson wrote:
#24

ChrisCarlson

Mar 23, 2015 15:20:22

Gah! Of course. I completely failed to include you demon-possessed left-handers. I'd apologize, but lefties don's deserve a fair shake.

#25

BoldItalic

Mar 23, 2015 15:30:56

ChrisCarlson wrote:
#26

ChrisCarlson

Mar 23, 2015 15:35:03

Failure to catch that the entire purpose of the post was a delivery a cheesy pun.

 

-1

#27

BoldItalic

Mar 23, 2015 16:21:13

ChrisCarlson wrote:
#28

Reius

Mar 23, 2015 17:16:56

Just flip a coin.

#29

BoldItalic

Mar 23, 2015 18:04:45

In the set of dice that come in the Starter Set box, the d6 has numbers on the faces, rather than pips. The "6" has a line under it, so you know it's a "6" and not an upside-down "9". Think about that one ...

(Reply to #29)

Reius

BoldItalic wrote:
#31

Torg_Smith

Mar 23, 2015 18:23:59

Here you go.

 

http://chessex.com/Dice/Specialty%20Dice/3_sided.htm
 

#32

BoldItalic

Mar 24, 2015 2:27:50

Torg_Smith wrote:
(Reply to #32)

AaronOfBarbaria

BoldItalic wrote:
#34

Byakugan01

Mar 24, 2015 3:28:39

I prefer using my 5-sided die.  Its hard though because all the sides have the same area without any repeated digits.