Genius!

Right, I generally struggle with 3kyu katas, but this one was quite easy ... the 1 line, 2 statement ruby solution is genius!

They are not exactly the same. My sudoku solver passes the other kata, but this one for some reason does not pass :(

I think random tests are broken in the Ruby version:

Random tests
Testing for qbvijarbjawewm and qarvjib
It should work with random inputs too - Expected: false, instead got: true
Testing for euyvotmmddjy and fqtieiowehtwxhuldjud
Test Passed: Value == false
Testing for pamfkfimuhxxmjku and afpm
It should work with random inputs too - Expected: false, instead got: true

qarvjib can be formed with with qbvijarbjawewm...
afpm can be formed with pamfkfimu...

I am running the Ruby version of this and I think there might be an issue with a test. My code passes all test except the [4,5] one. Which says "excepted 1 got 0):

Log
{"4,5"=>1}
Expected: 1, instead got: 0

However, we are talking about 20 as the value to arrive to... and according to a different test, [20] there should be only 1 combination: [4,5].
So following the logic of other tests: Total Combinations - Original Combination (IF it is valid, as [20] is not valid). [4,5] should be 0 and not 1.

this solution... :-D

Same here, failing Test #9 (expects false, implementation returns true).