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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.
Haha yeah he is. Why do you ask?
This was a good kata, though seems a bit tough at 6. I'd think 5?
I would say yes that pattern recognition is a skill, as well as understanding the problem. Much of the complexity of this problem is in understanding it.
Wow. I was just happy to solve this in about an hour. Bravo!