In the description.

If you absolutely need more than what is in there to solve the kata, please raise an Issue.
If you would like to have more to solve locally or something, please accept you're going to have to solve on CW ( or get creative filling in what's missing ).

I worked on it from beta to release more than two months, and you want to get through it in just two days?

Don't give up:) You can modify and use sample tests for debugging

Hi! Your last well-commented and working solution doesn't mentioned this You have to find the code in 16 calls or less And you see something like Test Failed The code was 8517 Expected: less than or equal to 16 But was: 27
Try to optimize your algorythm