Missing a picture for the n = 3 example!

Would you please be so kind to tell if (and how) this kata conforms to this point of authoring guidelines?

Do not use problems from other sites, unless it's allowed by that site's licensing policy and/or terms of use. Explicitly give appropriate credit if your kata is based on, or inspired by, someone else's work.

For the record: original problem is problem G in this set.