800 ms for all the puzzles together or for one sudoku?

Agreed =)

I saw a similar error using Javascript. I had an error in my code that had nothing to do with JSON. I fixed the error and everything worked.

Great kata. Worthly of it's rank.

I liked this kata a lot. The introduction is spare, but I thought the requirement was clear from the context of the example. It took longer than I'd want to admit, but it was satifying and instructive to arrive at a simple solution to a simple problem. Thanks for offering another excellent kata!

Output format varies for different languages - e.g. for Java it is Set<String>

Please refer to the example tests for clarification what is expected format for your language.

I was confused about the format of the answer. I thought you were looking for a string of comma separated results, or perhaps separated by newline. In fact, the answer is supposed to be an array of strings.

Thanks I'm glad you liked it. :). Thanks for your time solving this kata.

Elegant, satisfying kata!

It worked correctly when I reset. Thanks again!

Thanks for letting me know. I wonder if a whitespace is being added at the beginning. When I run the test, there is a space in the code in the line following "Your code:". You might consider trimming leading and following whitespace. Thanks for your response and for the challenging kata.

it's surely 29 chars. 12 other guys and my solution are same as this one ;-)

I retyped it in directly, and got the same result.

But this one is exactly 29 characters, not 30
it should pass ;-)