When playing a game using D6 -- and only D6 -- we're sometimes confronted with a need to make a selection from equiprobable items.

For example, pick a random day of the week: 7 choices, but only 6 sides to a die.

What can we do?

How can we select fairly among …

I went deep into OpenD6, chasing an idea through a maze of strange shapes.

See this extract from a Jupyter Notebook: Area Effect Aspect Volume Computations.

It was a lot of fun to uncover two errors in the rules, and work out what could have been used instead.

A "Dice Mechanic"? Yes. The thing you do with the dice to determine an outcome. We'll use Python to see how the dice shake out.