here is a 4x4 that naively seems like it should be a legal solution, but isnt:

    1010
    1010
    0101
    0101

same number of 0s as 1s per row same number of 0s as 1s per col no rows or cols with run of 3 of same value

edit: oh - "no two rows are the same". fail. disregard this. must have clicked past that in the tutorial.

That's the point of having a clear set of rules somewhere because most people skipped that part of the tutorial. (I did too) I had to be stuck somewhere, quit the game and redo the tutorial very slowly just to see if there's a rule I didn't see ;)

Another way to find the rules is to use the "eye" on every turn in a 6x6 or 10x10.