Add-to-13 Solitaire

## Description

_Add-to-13 Solitaire_ is a solitaire card game also known as _Pyramid
Solitaire_. Cards are placed in a pyramid shape of seven overlapping layers.
The goal is to get all cards to the foundation. But cards can only be moved
there in pairs when the add up to a value of 13. Cards in the stock can be
turned if no moves are available. A turned card can be used to make a match,
but if there is no valid move it’s moved to the foundation regardless.