Curta

[**Curta**](https://curta.wtf) is a CTF protocol that involves creating and solving EVM puzzles. By participating, authors can earn fees from the puzzles they create, and players can earn NFT rewards and a place on the [**leaderboard**](https://curta.wtf/leaderboard). The format of the puzzles are completely open-ended, so there'll likely be puzzles that are suitable for both seasoned CTF players and those new to the game.