B-SIDE
A CTF challenge series with fun puzzles to enjoy every day — B-SIDE
What is B-SIDE?
This side program features challenges with a different flavor from Daily AlpacaHack. We publish harder or more unconventional challenges from time to time.
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.
Today's ChallengeNo challenge is currently active.
Leaderboard
Period
Upcoming challenges reveal the , , and in advance. 
iwancof 
k0080 
minaminao minaminao
Mon
Tue
Wed
Thu
Fri
Sat
Sun
iwancof1-3
kakur41
kakur414-7minaminao
minaminao8-11k0080
k0080k008012-15
tchen
tchen16-19minaminao
minaminaominaminao20-23
kanon
kanon24-26minaminao
minaminaominaminao27-29tchen
tchen30-31
pppp4649
pppp4649
