CodeCup 2020 - An online programming competition  

CodeCup 2020 - An online programming competition

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 2020 the game for the contest is Gomoku. We have placed a description of the rules online. You can always watch a sample game being played.


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 black and white.

We will hold test competitions every three weeks starting at the end of September. 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 next test competition has been scheduled for December 28th 2019.

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!


We started a test competition on 3 August 2019. Because of a recent upgrade of Ubuntu, three older compiled players were not working well. After this competition we recompiled and ran another test competition. That one ran smoothly...

We are proud to publish the CodeCup game 2020 so early. The game is an existing game and is called Gomoku. Basically Gomoku is a game that also could be called Five in a Row. There are different official variants of this game and we have chosen one of them. We have included a version with one of the existing swap rules. The final competition will be held in January 2020. Both NIO-contestants (Dutch students from High School) as CodeCup users participate in the same competition. Have fun!