Join others around the world in attempting these weekly code puzzles

Event Start

1st January 2026

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142

Players

Countries

270

Challenges Solved

141

Code Solutions Uploaded

Programming Languages Used

Recent Solved Challenges

Egal28 solved challenge 1 - Happy New Year 13 hours ago BMC solved challenge 37 - Anagrams 3 days ago greenya solved challenge 37 - Anagrams 4 days ago Anon solved challenge 34 - Run-Length Encoding 6 days ago BMC solved challenge 36 - Square Sum 1 weeks ago greenya solved challenge 36 - Square Sum 1 weeks ago BMC solved challenge 35 - Some Good Points 2 weeks ago greenya solved challenge 35 - Some Good Points 2 weeks ago BMC solved challenge 34 - Run-Length Encoding 3 weeks ago greenya solved challenge 34 - Run-Length Encoding 3 weeks ago test2 solved challenge 15 - Some Mars 3 weeks ago test2 solved challenge 10 - Game Chatroom 3 weeks ago test2 solved challenge 11 - URL Shortener 3 weeks ago test2 solved challenge 4 - A Human Message 3 weeks ago

Create a private leaderboard for your friends, school, university, workplace...

Accessible for all - if you're a high school or college student, you should be able to attempt and solve all of the challenges

If you're struggling, help will be available via social media and solutions will be visible once the week has finished - though submissions can be made any date!

The larger the community becomes, the more fun taking part in the weekly challenges should be - feel free to share the site amongst your friends, classmates, colleagues, social media groups etc!

Good luck - and have fun!