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This opportunity closed on 12 March 2026. The page stays up for reference. See what's open now in Coding Competitions for Singapore Students.
Competition

Lag and Crash CTF

Run by Polytechnic Cybersecurity Interest Groups (Interpoly)

Deadline: 12 March 2026

HybridOnline qualifiers; finals in person in Singapore30-hour online qualifier; one-day in-person final for the top 10 teamsFreeOpenLow effort

About this opportunity

Singapore's inter-polytechnic capture-the-flag competition, run by the polytechnic cybersecurity interest groups. Teams of one to four solve web, cryptography, reverse engineering, forensics, OSINT and binary exploitation challenges in a 30-hour online qualifier. The top five polytechnic and top five non-polytechnic teams go on to an in-person King of the Hill final, where Singapore-based pre-university teams compete for cash and training prizes.

Who can apply

Qualifiers are open to any team worldwide, but only Singapore-based pre-university teams (secondary school, JC, ITE and polytechnic) can reach the finals and win prizes. Teams of 1 to 4, each member with their own account.

How to apply

Register your team on the Lag and Crash CTFd platform linked from lagncra.sh. The 2026 edition (6.0) closed registration on 12 March, ran online qualifiers on 16 to 17 March and held finals on 20 March. 2027 dates not yet announced.

What you get

Prize money

Frequently asked

Who runs this?+

Run by Polytechnic Cybersecurity Interest Groups (Interpoly). More on their website.

Who can apply?+

Qualifiers are open to any team worldwide, but only Singapore-based pre-university teams (secondary school, JC, ITE and polytechnic) can reach the finals and win prizes. Teams of 1 to 4, each member with their own account.

When's the deadline?+

Applications close on 12 March 2026.

Is it paid?+

No fees to apply. Selected participants may receive a stipend or prize from the organiser.

How do I apply?+

Register your team on the Lag and Crash CTFd platform linked from lagncra.sh.

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Last verified 27 September 2026·Updated 27 September 2026·Source

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