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B-SIDE

A daily CTF challenge with a fun new puzzle every day

What is B-SIDE?

This side program features challenges with a different flavor from Daily AlpacaHack. We publish one harder or more unconventional challenge every few days.

Join Anytime

Solve each challenge within its time window to appear on the leaderboard.

Not a Competition

Discussion with friends or AI is welcome (account sharing is prohibited).

Solution Sharing Rules

Sharing solutions is allowed only after the challenge period has ended.

New to CTFs?

This program features higher difficulty and unconventional challenges. Try the beginner-friendly Daily AlpacaHack first to warm up.

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Today's Challenge
colza
kappa maki
Pwn
Hard
29 solves
Submissions (latest 3)
serioton
serioton

SOLVED!

Jul 14, 12:26 PM

Leaderboard
Upcoming challenges reveal the , , and in advance.
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tan90909090tan90909090
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1-5
minaminaominaminao
missing ✌️
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pppp4649pppp4649
Re:Small e
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Very Hard
24 solves
12-16
colza
kappa maki
Pwn
Hard
29 solves
 
colza
kappa maki
Pwn
Hard
29 solves
17-22
minaminaominaminao
Planned topicNetwork
Misc
Very Hard
 
Planned topicNetwork
Misc
Very Hard
23
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Writeups

kirehash

Writeup for invisible-grep

kirehash

ja
invisible-grep

4 hours ago

tchen

Writeup for InstaTalk

author
en

2026/07/06 07:37

Rows:

Resume Maker

Topic: PHPReleased: Mar 5, 2026

62 solves
Web
Very Hard5.5

by

tchen

tchen

Create your resume and share to others!

resume-maker.tar.gz

Please sign in to submit the flag.

descriptionsolveswriteups