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. 
hiikunz 
yu212 
iwancof
Mon
Tue
Wed
Thu
Fri
Sat
Sun
30-31
k0080
k00801-3
minaminao
minaminao4-7hiikunz
hiikunzhiikunz8-12
pppp4649
pppp464913-15
kakur41
kakur4116-18k0080
k008019-21yu212
yu212yu21222-24
tchen
tchen25-30iwancof
iwancofiwancof1-3kakur41
kakur41
