This is a crazy project to implement the gameplay of 5D Chess With Multiverse Timetravel in SQL.

Also I made a small custom test framework in Ruby. The code defining the test macro is brutal but the tests themselves are straightforward. Each test is of the following form:

name
---
the sequence of movements
from (w,x,y,z) to (w,x,y,z)
from (w,x,y,z) to (w,x,y,z)
...
---
an assertion query