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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
With the .Distinct() fix, as suggested by "zombibly", this is both a clean and clever solution! Linq for the win :D
i have my solution! My message is, that this solution here is a Fail.
You could take a .Distinct() of row, column, and 3x3 square to make sure you have 9 distinct values. This would also allow you to verify each number is within the 1-9 boundaries.
this Soltion lags with the following (only fifth, or 9,9,9,9,2,2,2,2,1)