Science Olympiad CodeBusters

Test Manager - Create/Delete/Edit Tests
Question Manager - Manage/Delete unused questions

Solving Guides!

Looking for solving guides for Ciphers? We have many excellent guides written by ACA members that should put you on the road to solving ciphers faster.

Cipher usage for Division B/C this year.

If you are trying to figure out what ciphers will be used for what type of event, we have a nice Summary of Ciphers used for the 2023-2024 Season that was made by reading the current rules. As always, any official clarifications or rule updates override anything on that page, but it is a good start.

If you are looking for a resource sheet to print out for practice, you can find it here.

New Ciphers!

For Division B/C we have added a preliminary version of the Nihilist Substitution Cipher. We are working to get the Complete Columnar Transposition Cipher implemented.

Summary of what's new:

An quick tutorial of using the tool can be seen at

Please report any problems at
Are you a coach looking for hints and solving guides? Here are three places to go:
Are you an Event leader looking to create a Division C Regional or Invitational test? You can use this sample test as a starting point for a good mix of questions and nominal score values. Don't forget to Randomize the Aristocrats and pick new values for the questions. You can also randomize the order of the questions when editing the test.

Create individual questions

2022 Samples

Other Samples

2020-2021 Regional and State Tests


This would not be possible without the tireless volunteer work of a good team of developers:

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