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A site based on the TV show Lost. Challenges range from easy to hard. Non-Lost fans will find this enjoyable too!
LOST-Chall
Sites origin country Switzerland
Language English
Category Tags Crypto, Stegano, Programming, Cracking, Logic, Exploit, Math, Storyline
Site Admins Varg
Auto update yes
Has OnSiteRank yes
WarBoxes 0
Score 27941
Base-Score 10000
Users 10214
Challs 199
Linked users 586
Average 13.41%
Difficulty 63.04%
Enjoyment 66.31%
IRC Contact irc://irc.idlemonkeys.net:6667#lost-challfoo
Score history for site LOST-Chall
Number of Users on LOST-Chall
Number of Challenges on LOST-Chall

Comments on LOST-Chall

Global Rank: 2
Totalscore: 702013
Posts: 21
Thanks: 22
UpVotes: 18
Registered: 16y 26d












Last Seen: 2d 15m
The User is Offline
RE: Comments on LOST-Chall
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Looks like this site is down at the moment Sad Hopefully just a temporary outage...
Global Rank: 35
Totalscore: 291087
Posts: 165
Thanks: 159
UpVotes: 175
Registered: 16y 61d
livinskull`s Avatar





Last Seen: 1d 1h
The User is Offline
RE: Comments on LOST-Chall
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Well, the plan had been to shut it down end of this year

Quote from bregi_2023-12-29

Lost-Chall has been operational since 2007, witnessing numerous changes over the years. I've dedicated the past 10 years to full-time software development and juggling various hobbies that don't involve a computer. The journey has been both enjoyable and challenging, but I've reached a decision to close down the site. However, I'm open to giving it away for free to anyone interested in hosting the site. It's important to note that I was quite young when I created the site, and it doesn't adhere to best practices. There's a considerable amount of redundancy, and it relies on a framework that has been deprecated for many years (Zend) while still running on PHP 5.4. Given these factors, a proper migration will require some time and effort. If you're interested in taking over, please don't hesitate to contact me at lostchall@gmail.com. In the event that no one steps up to run the site, I plan to shut it down at the end of 2024. At that time, I will email a zip file containing the source code, allowing you to access the answers to unsolved challenges. Wishing you all the best, Bregi


There is a (tentative) replacement up on https://lost-chall.wechall.net/ Smile
This is still in experimental stage though, and is not in-sync with the latest database.
Last edited by livinskull - Apr 29, 2024 - 11:19:41
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