Is breaking the top solutions wrong if the top solutions don't correctly check for a valid sudoku?

@pythor77 In order for someone to answer your question you will have to show exactly what you put into the test case.

e.g. if your test case is:

  [[[1, 2, 3, 4, 5, 6, 7, 8, 9],
    [2, 3, 4, 5, 6, 7, 8, 9, 1],
    [3, 4, 5, 6, 7, 8, 9, 1, 2],
    [4, 5, 6, 7, 8, 9, 1, 2, 3],
    [5, 6, 7, 8, 9, 1, 2, 3, 4],
    [6, 7, 8, 9, 1, 2, 3, 4, 5],
    [7, 8, 9, 1, 2, 3, 4, 5, 6],
    [8, 9, 1, 2, 3, 4, 5, 6, 7],
    [9, 1, 2, 3, 4, 5, 6, 7, 8]], "Try again!"]

then of course it will pass. You are not providing enough info to tell why you are not getting the result you expect to get.

It's worse than that. It also fails on this one:

(def board
  [[1 1 1 1 1 1 1 1 1]
   [1 1 1 1 1 1 1 1 1]
   [4 4 4 4 4 4 4 4 4]
   [4 4 4 4 4 4 4 4 4]
   [5 5 5 5 5 5 5 5 5]
   [6 6 6 6 6 6 6 6 6]
   [7 7 7 7 7 7 7 7 7]
   [8 8 8 8 8 8 8 8 8]
   [9 9 9 9 9 9 9 9 9]])