Welcome to CodeCup!

We offer you a challenging programming contest. Anybody can participate; there are no age restrictions or other special requirements. The CodeCup never charges entry fees.

In 2024 the game for the contest is Sudoku. We have placed a description of the rules online. You can always watch a sample game being played.

Competition

After you login in to the CodeCup system you can submit your program. You can find the submission section under "My submissions". Your submission will be tested automatically against our sample players to ensure that it follows the rules. After passing this check your program is ready to compete! Note that your program must be capable of playing both as first and second.

We will hold test competitions every three weeks starting in August. In these competitions you will see how your program performs against other players. You can follow the complete games and use this information to improve your strategy.

The official Sudoku competition has been played on January 20th 2024. You can go directly to the final ranking of the programs.

Testing at home - Caia

The CodeCup Team enables you to test your program at home. Our testing software is free and enables you to organize competitions at home without involvement of other people. The software to play at home is called Caia. It works in the same way as our contest software. By hosting your own local competition you can test and improve your program in a fast and easy way. Download Caia and start today!

News

It took us a little bit longer to prepare and finalize the rules and the software of the new CodeCup game 2025. But the new game will be published now very soon. The game is called Box. You can have a look at https://www.perplext.com/packogame/box to find out more of this game. We keep it really close to the original game, designed by Chris Handy. Due to our CodeCup format there will be only small adjustments, like board size and so on. For the Dutch highschool kids we play this year a simplified game of Box on nio.codecup.nl, called Squares. To be continued...