We are extremely sorry that the Náboj competition could not take place on Friday 13th March 2020 due to the COVID-19 outbreak. The international team has, therefore, made the decision to hold it online on 11th December instead. We hope to have Náboj 2021 in person again.

If you have any questions, please contact us via the email address


  • From 16th November to 8th December
  • Every school may register any number of teams in each category, however, in the first round of the registration, only the first two are enrolled. Next teams are inserted into a waiting list and may be enrolled in the second round depending on the capacity. See rules for more info.
  • In case of exhausting the capacities a team may be registered as a substitute. If a team cancels their registration the first substitute team will automatically take their place. The order of the substitute teams can be found here.
  • By registering as a substitute team, you help the organizers to monitor the demand for the competition.

Team Editation

  • You may edit your team's line-up until 10th December 2020 (one day before the contest).

Registration Instructions

  • Please note that Náboj Online has three categories, Junior, Senior and Open. The categories your team can possibly apply for is determined by the (expected) date of graduation from your high school. See the rules for more information.
  • You will receive an e-mail after the form submission with a link to confirm the registration. Registration is valid only when confirmed!
  • In the case of any problems do not hesitate to contact us.


Start typing city, street or the name of the school. Then choose the school from the drop-down list.

Contact details
First name
Year of birth
Year of graduation

The participants can be specified later, however no later than 10th December 2020.


By registering to Náboj, the students, their teachers or their parents agree with the rules of the competition and are required to follow them.

The competitors authorize Charles University (Univerzita Karlova), Ovocný trh 560/5, 116 36 Praha 1, Czech Republic, ID 00216208 (referred to as CU from now on), to process their personal data, necessary for their participation in Náboj competition, and to keep them for the period of 10 years from the moment of registration. They also agree to publish their name, surname, study year and the total number of points obtained within respective teams and schools in dedicated result lists. This agreement includes also the long-term storing of archive data (included the published result lists) for periods longer than the former quota.

Faculty of Mathematics and Physics CU (Matematicko-fyzikální fakulta UK), Ke Karlovu 3, 121 16 Praha 2, Czech Republic (referred to as FMP CU from now on) uses the above personal data to maintain competitor lists, to ensure adequate communication between the organizers, to analyze the efficiency of its reachout activities and to publicly report on the competition.

The above personal data will not be forwarded to third parties with the exception of the organizing institutions in the country where the competitors compete. The personal data will also not be used for other purposes than listed above.

The competitors also agree to publish photographic and video materials containing their appearance and they also agree to use this material for reporting on Náboj competition. FMP CU will manipulate with such materials in agreement with Act no. 89/2012 Coll. of the Czech Republic.

Note that it is possible to retract this agreement anytime, by sending an e-mail to naboj org alt64 gdpr. Furthermore, it is possible to request the removal of archive materials, if it is technically possible.

The competitors have right to:

  • ask which personal information are processed,
  • request to update these information, provided that they become obsolete,
  • request not to process their personal data until other requests of the competitor are processed,
  • request to forward their personal data to a third party,
  • file in a complaint to relevant authorities.

In the case of further questions or to enforce their rights, the competitors are encouraged to contact the CU authority responsible for personal data protection by sending an e-mail to cuni cz alt64 gdpr.

Please confirm your registration by clicking on the link in the e-mail, which you will receive after submitting the form.