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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.
There is just a misunderstanding in description I think. There is "the better the player the LOWER the handicap." It should be HIGHER. With that thinking my coding start working :D