How fair are your dice?

unfair dice

unfair diceFor my day job I am a data scientist. I decided to show a co-worker how to plot a kernel density estimate and needed data so I grabbed some standard 16mm, rounded corner, deep pipped dice and rolled them in three trials of 20 dice. I knew they were not accurate but the results were a little surprising. For my dice on the surface I was using (hard plastic table top) the Five came up significantly ahead of the other dice. It’s generally considered that the more pips, the less momentum to carry the die over. One would expect the six to be ahead of the five. However the test suggest that the symmetry of the pip placement for the 5 over the parallel lines of the 6 allowed the 6 to roll off more often. The colored lines are the individual trials. The line made of circles is the composite KDE. The dashed line is what ideal, fair dice would have produced.

If anything, this gives me good incentive to seek out fair dice (casino level of fairness). This is usually possible with dice apps. However it means that everyone should use dice apps. If someone is using actual dice vs. someone with an app, given the distribution above, they may be at an advantage or disadvantage. Something to consider, especially in games where a process requires multiple rolls where some are ideal when high and others are ideal when low.

Nashcon Photos



Do you have photos you took at Nashcon up online? Add a link in the comments and share them with everyone!

Below are a few from my own personal collection here.





Nashcon Events List


The final events lists are now ready!

Nashcon 2015 Event List

Nashcon 2015 Mobile Events List

NAGA program

The beautiful thing about the web is that you can access this from your mobile device. The Mobile version of the events list is designed to be especially readable on smart phones. We will have QR Codes up at the convention site as well so you can get these links easily with your mobile device.

See you at Nashcon!