The problem CryptoStumps solves

All the fantasy sports applications are centralized and non transparent. We see this problem and want to provide our solution. Crypto stumps lets you play games without a centralized server. Since there's no central authority controlling the game, it's more secure.
Because all transactions and data are kept on a public blockchain, crypto stumps also increase transparency. It's more transparent than Web 2.0 games, where game developers usually control gameplay data.
Through decentralized governance mechanisms, players can vote on game updates and changes using crypto stumps.

Challenges we ran into

It was a challenge to form a contest by a user view. it was a great trouble to detect the users performance. we figured it out using multiple structs and mappings