No, I'm sorry, I just gave up after infinite tries

Hi, thanks for the answer but I don't think you got the problem (or maybe I don't get your answer). I know that table isn't regular and my program recognizes it too, but only if I reorganise the input of the test as an array of arrays, as it should be. I'm thinking the problem might be that that input given by the test isn't an array as the others, but something else. I can't understand what type of data is that: it has spaces, so it isn't a number, but it hasn't the quotes, then it isn't a String.

Ok, thanks. Edit: I wrote that same input as an array of arrays:
console.log(validSolution([[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 5, 6, 7, 8, 9]]))
and the result is "false".
Obviously if I do this:

console.log(1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9)
it gives error. Do someone have an idea?

Hi, can someone explain me why it expects this to be 'true'? And what does that 'pre' mean? And why the input isn't an array? My function seems to work on other tests. Thanks a lot

Expected 'true' on input of

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9