• The O'Reilly Golf Challenge

From August 21st through August 28th, we are running an O'Reilly Media challenge with loads of prizes for all of the top solutions!

Go play O'Reilly Media's Text Holes Golf mission to win something awesome for yourself!

Remember, the contest ends August 28, so get coding!

Become Awesome

  • No Ads
  • No Limits
  • More Content

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