0x03 Capture the flag

Online qualifier, then the final on day one

Capture the flag

Play the free qualifier from anywhere. The top teams play the final in Dehradun.

Qualifier: 17–18 February 2027
Length: 36 hours
Final: Saturday 3 April
Teams: 1 to 4 players

Capture the flag0x03Qualifier 17–18 Feb 2027FreeCapture the flag0x03Qualifier 17–18 Feb 2027FreeCapture the flag0x03Qualifier 17–18 Feb 2027FreeCapture the flag0x03Qualifier 17–18 Feb 2027FreeCapture the flag0x03Qualifier 17–18 Feb 2027FreeCapture the flag0x03Qualifier 17–18 Feb 2027Free

Final · 3 April 2027DehradunBring a laptopOn siteFinal · 3 April 2027DehradunBring a laptopOn siteFinal · 3 April 2027DehradunBring a laptopOn siteFinal · 3 April 2027DehradunBring a laptopOn siteFinal · 3 April 2027DehradunBring a laptopOn siteFinal · 3 April 2027DehradunBring a laptopOn site

01 What it is

For first-timers and regulars

Easy flags to start, extreme ones to chase.

First CTF? Good.
Entry-level challenges are in on purpose. Say so on the form.
No team? We pair you.
Tick the box and we introduce you, before the round or at the desk.
Tuned by our team
Every online challenge on LevelUpCTF is reworked by us. The final is built in-house.

$ register --free --team-size 1-4
registration open · no ticket needed
$ qualifier --online --hours 36
17–18 February 2027 · start hour by email
$ results
everyone hears by 28 February 2027
$ final --onsite dehradun
Saturday 3 April · bring a laptop
$

A long line of bench desks in a hall, around twenty-five people working at laptops — Players at an earlier BSides Dehradun CTF

02 How it works

Qualifier to final

A pass is only needed if you reach the final.

Open nowRegister hereSolo, create a team, or join one.
17 February 2027Online round36 hours, from anywhere, free.
28 February 2027Everyone hears backQualified or not, by email.
3 April 2027Final, on siteTop qualifiers, own laptops.

Getting into the final: A full pass, or the ₹799 competitor passPer person. Competitor pass details
Who qualifies: The top qualifiersThe cut line and tie-break are published before the round opens.
Fair play: Write-ups and plagiarism checksSolves are verified before the finalist list is fixed.
Format and prizes: Published with the programmePrizes depend on sponsorship.
Arriving early?: Trainings run 1–2 April 2027Two days hands on, conference pass included. See trainings

03 Register

Register for the free round

Five fields. We email the start time before the qualifier.

How are you playing?, required

On my ownA team of one.

Creating a teamYou get a code to share.

Joining a teamYour captain has the code.

Team code, if you are joining No code yet? Register anyway and say so.

Your name, required

Your handle, required Shown on the scoreboard.

Email, required Start time and team code go here.

Team name, required Solo? Your handle works.

More options (optional)

Everyone else on the team One name per line.

CTF experience

Does not affect scoring.

How many of you 1 to 4, yourself included.

Pass for the final

Ticket reference Only if you have a pass.

Anything we should know Access needs, or a category to point you at.

Pair me up with other playersNo team, or room for one more? We introduce you.

The code of conduct applies to us, required

Complete the security check before registering.

Not a payment. Email us if the check fails.

04 Fair play

Five rules

The full ruleset goes out with the programme.

Rule 01: Attack the challenges, nothing elseThe platform, the wifi and other laptops are off limits. Found a bug? Tell us.
Rule 02: Flags stay inside your teamSharing a flag costs both teams the points.
Rule 03: Qualifying solves are checkedA write-up does not need to be elegant. It needs to be yours.
Rule 04: Broke something real? Say soNobody is removed for an honest report.
Rule 05: The code of conduct appliesSame reporting route as the rest of the event.

Coming with the full ruleset

Categories
Scoring
Hints and their cost
Tie-breaks
The cut line

05 Earlier editions

Heads down

A player leaning in close to a laptop, a line of desks behind — Heads down on a challenge

Two players sharing a desk, one laptop open on a terminal — Two hours in, same problem

A laptop from over a player's shoulder, a dark terminal filling the screen — One screen, close up

06 Questions

CTF questions

Ask: [email protected]

Do I need a team?

No. On your own you are a team of one. Or tick "pair me up" and we will introduce you.

Does everyone need a ticket?

Not for the online round. For the final, every player needs their own full pass or ₹799 competitor pass.

Can I come only for the CTF?

Yes, if you qualify: the competitor pass covers the final on day one only. It is on sale from 1 March 2027 at 12:00 AM IST to 25 March 2027 at 11:59 PM IST, and you can upgrade later by paying the difference. Details

I have never played. Is it worth it?

Yes. The entry-level challenges are there for you. Say it is your first on the form.

Do we send a write-up?

Plan to explain how you got each flag. Rough notes that show the route are enough.

What if we do not qualify?

You hear either way. A conference pass still covers both days, and the villages are on day two.

Start with the free qualifier.

Capture the flag

First CTF? Good.

No team? We pair you.

Tuned by our team