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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.
I think the description is still unclear for the second method.
It schould say something like "all numbers between first and last"
I would really like to see kata descriptions when browsing the Library for unsolved Katas to train on. They are displayed on the dashboard for the next suggested kata, so why not include them on the kata's detail page.
This comment is hidden because it contains spoiler information about the solution
Yay :)