my own code kata
first failing test
pass
fail
pass
fail
can display the grid
solve method
failing implementation
grr, bodged up by testing too much functionality in a single test
fill up the grid based on a refactored function
better organization and passing tests. failed to keep good cadence
dont know the valid moves
valid moves function
stub
define valid moves
define values for valid moves
purge dead code, not being disciplined enough with refactoring steps
make test pass
refactor