• CheckiO Ghost missions: Start playing now!

If you were watching earlier this week, you'd know we've got two ghost missions out there haunting the seas of CheckiO! These missions are only available for the weekend, so get on them and be the first to earn the special ghost badge!

A ghost ship has appeared nearby, but it's impossible to find through all this fog. Write an algorithm to detect it in the Ghost Detect mission.

Map out all of the safe zones where the Flying Dutchman cannot sail in Safe Coasts. Everyone is relying on you to navigate them to safety!

These missions will evaporate Monday at 11:00 GMT. Happy coding!

Welcome to CheckiO - games for coders where you can improve your codings skills.

The main idea behind these games is to give you the opportunity to learn by exchanging experience with the rest of the community. Every day we are trying to find interesting solutions for you to help you become a better coder.

Join the Game