this is brilliant!

好兄弟，这玩意怎么证明的知道吗？我菜狗只能用递归

Absolutely incredible solution, no notes.

太牛逼了

the best and short way i have seen

You took away all of my sense of accomplishment and made me look like totally dumb ars!

BTW, wow.

it is the best 'wasted my time' moment

And why do you downvote my answers explaining why you should use spoiler flag? You can simply see the homepage and realize that, I'm not saying it's obvious, hence, my posts explaining why. In fact I suggested the spoiler flag was marked by default in solutions or adding a placeholder, but it didn't happen so, the best I can do is tell the users that don't know how it works, what should be done.

@Chrono79 I have no idea how someone is supposed to know that replies/comments in the solution discussion are visible on the homepage. I just joined codewars and I had no idea it works like that if I didn't see your comment. I wouldn't have known I need to put a spoiler flag in a reply to the solution. If you want that to happen, there needs to be some announcement somewhere that comments posted here are visible on the homepage without a spoiler flag.

Check row can be done easier with: for (int[] row : sudoku)

nice solution

It's a bit of a shame that the answer can be this straighforward in Java but python need to use more in-depth algorithm in order to pass :/

Absolutely beautiful solution, what do I have to look for if I want to learn cool number theory like this? My maths is pretty bad, but I love learning about these sort of things.