Category Archives: Fun Stuff

Harriet Tubman On the $20 Bill

/home/content/04/10839404/html/steve/wp content/uploads/2016/04/160428 Harriet Tubman

This is the first $20 bill. It was issued in the 1860’s. Lady Liberty was on it.

We’re just bringing her back as Harriet Tubman.

Another important note: Andrew Jackson didn’t appear on the $20 bill until 1928.

Before that it was:

  • Grover Cleveland (1914).
  • George Washington (1905)
  • Hugh McCulloch (1902) (Not a President!)
  • John Marshall (1890) (Not a President!)
  • Daniel Manning (1886) (Not a President!)
  • James Garfield (1882)
  • Stephen Decatur (1878) (Not a President!)
  • Alexander Hamilton (1869) (Not a President!)
  • Pocahontas (1865) (Not a President!) and
  • An Eagle (1863) (Not a President…)

Lots of not-Presidents. šŸ™‚


2d6-2d6 as a Base Roll For Roleplaying Games

So I am one to sometimes meddle with making roleplaying systemsĀ (in fact I’ve been playingĀ games in that system for years now)Ā  but in the afterglowĀ of storytelling at PrinceConĀ for the first time in a long time, I more seriously started to ponder about dice. The PrinceCon system — now with more than 40 years ofĀ history behind it — presently runs off of a d20 OGL-based system which (like all d20-based games) resolves randomness with a roll of a 20-sided die, plus modifiers, to meet or exceed a difficulty.

d20 probabilities to roll "at least" the number shown. From

d20 probabilities to roll “at least” the number shown. From

A single die roll, of course, is a completely flat distribution. You have a 5% chance to land on any one number and a 50% chance to roll an 11 or higher.


The 3d6 bell curve. From

I’m not one who likes flat distributions (they’re all over the place)Ā so when I play d20 I tend to play with the 3d6 variant, which makes a nice bell curve (seen above) whose peak falls betwixt 10 and 11, and whose extremes (3 and 18) have a mere ~0.5% chance of happening.

Probabilities for landing at least on the number listed for 3d6. From

Probabilities for landing at least on the number listed for 3d6. From

This works well for many things,Ā but it’s not as elegant as a d20 in some respects. First, a d20 has a range of 20 values. In a system where a value of 10 is average (like d20 OGL) that works out well. 3d6 only has a range of 16 values (3-18), so it is much shorter and by default, difficulties below 3 areĀ impossible (which effectivelyĀ takes out a chunk of range). Furthermore, none of the values on the curve are nice “round numbers.” Getting a 10 (base) is aĀ 62.5% chance,Ā getting a 15 (+5 base) is ~5%, and getting an 18 (+8 base) is about 1 in 200.

Playing around with probabilities on (awesome site) I fiddled around with different possible dice combinations and unexpectedly found that 2d6-2d6 might present a more elegant solution.

2d6-2d6 bell curve. From

2d6-2d6 bell curve. From

Where it seems like a lot of dice (and a bit more math) 2d6-2d6 creates a beautiful graphĀ with some elegant properties.

  • First of all, it’s a nice bell curve.
  • Second, the peak of the bell curve is on 0, so all results will fall around the base modifier. In a system where the base statistic is 10 that means that a roll will range between 0 and 20 (just like d20, albeit 0 is possible).
  • Third the major increments fall upon rather round probabilities:
"At least" rolls on 2d6-2d6. From

“At least” rolls on 2d6-2d6. From

  • About 90% of the time you’ll at least hit -4 or more.
  • AboutĀ 75% of the time you’ll hit -2 or more.
  • About 2/3rds of the time you’ll hit -1 or more.
  • Base probability (0) is 55% (as close to half as one can get)
  • +2 is almost exactly 1 in 3
  • +3 is roughly 25%
  • +5 is roughly 10%
  • +6 is roughly 5%
  • +7 is roughly half that (~2.5%)
  • +8 is roughly 1%
  • +9 is roughly 1 in 250; and for something truly epic
  • +10 is roughly 1 in 1000

This progression makes incremental changes to the difficulty of a task ease into a curve with some nice round numbers. šŸ™‚

And given that the extremes happen so rarely, it gives a good excuse for an epic resolution as they really are a one-in-a-thousand shot.


A comparison of all three curves. From with modifications.


Now, this has direct application to d20-like games. The only thing that would have to change is the calculation of base skill levels and roll modifiers as now everything would need to start out at a base of 10. In the end you would get the same range as a d20, but with a nice bell curve.

Mean Deviation: Range:
d20 10.5 5.7 20 [1-20]
3d6 10.5 2.96 16 [3-18]
2d6-2d6 0 3.42 21 [-10-10]

As such IĀ believe that there is some good potential for using 2d6-2d6 as aĀ base roll for table-top RPGs.


Fr. Georges LemaĆ®tre – Patron Saint of Blowing $#*+ Up

Georges LemaƮtre Patron Saint

Yeah, more religious memes from me lately.

When you get an idea in your head, it just needs to come out.

Fr. Georges LemaƮtre theorized the Big Bang two years prior to Hubble, and yet Hubble had the Hubble Constant named after him. It should be the LemaƮtre Constant.

Go fig. šŸ™‚


Introducing the MultiPad Cipher

multipad cipher

I’ve always had a fascinationĀ with cryptography and the idea of an uncrackable cipher, so a few weeks ago I had a crazy idea for a variation of the One-Time Pad or Vernam Cipher (which you can read about here)Ā Ā with a fun mobile-phone enabled twist.

Thus the MultiPad Cipher was born, which is a quick and easy way to encode a secret message in an arbitrary number of noise layers or “pads.”Ā Each pad is represented by a QR Code which, when scanned by a mobile device, adds them together to eventually reveal the secret message.

The current proof-of-concept web app I’ve put together can generate pads for distribution to your friends, encode/decode messages with those pads, and can also “fragment” a pre-determined message into a number of parts (in case you need to keep a secret among more than one person where each party doesn’t know it on their own, or need a way to track a scavenger hunt, etc.).

Give it a shot.Ā Tell me if you like it. Send me bug reports. šŸ™‚