What did you expect to solve? What are most of the coins solve?
Sumokoin is a monero based coin (probably the coin that offers the highest level of privacy at the moment which means it can be easily adopted as fungible currency by anyone for whatever exchange is performed over the internet ) without the issues and problems Monero has developed all over the years. Sumokoin's unlinkability and untraceability guarantees the coin's future.
Good luck with your search