initial hardsolver test
broken
inconsistent state in ruby itself maybe possibly
Weird bug
debugging printstuff
merged test.rb from minimal-testcase
remove GC call
remove GC puts
merge make_guess() into solve(), split out raise_if_invalid
split out easy_solver
compress puts statements to single line
get rid of useless return statement
readability
removed easysolver call. it works for some reason now
remove unnecessary stuff
cleanup
initial refactor inspect method
cleanup inspect
remove solved_cell tracker, as it now does nothing
fixed inspect; added project euler problems