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Level I Challenges (89)

Page 1 of the challenges in Level I, ordered by date posted (the most recent appear first).

Strange Message from Thessaloniki

[schroedel-05] - 46 users already solved this challenge, 6 are working on it.
 
 
 

This postcard from Thessaloniki was written in German in 1897. The encrypted text can either be considered as message from the sailor Fritz to his wife at home, or as a note regarding spionage activities. Can you determine the codeword that was used to request secret information?
Read more...

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Author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published on: 2012-12-10 15:10
Maximum number of attempts for this challenge: 15

All successful users of this challenge

Rank User (#46) Achieved points (Global score) y-m-d - h:m:s

Hans Peter (hanspeter) 200 (52356) 2012-12-10 20:46:24
Viktor (Veselovský) 200 (169444) 2012-12-10 21:35:02
Armin Krauss (argh) 200 (206965) 2012-12-10 21:35:41
Bart den Hartog (Bart13) 200 (149337) 2012-12-11 00:52:40
#5 Kurt Gebauer (Yokozuna) 200 (286256) 2012-12-11 05:49:57
#6 J. M. (jomandi) 150 (113270) 2012-12-11 23:06:15
#7 Michael Möller (michaelm) 111 (256593) 2012-12-18 17:37:36
#8 Julia Werdelmann (jw) 110 (10407) 2012-12-19 23:41:46
#9 KW (qwer*) 104 (13963) 2013-01-06 20:23:30
#10 Kirill (ineaugh) 101 (1920) 2013-03-23 02:30:14
#11 Petra (humppapenguin) 101 (3872) 2013-03-27 10:37:25
#12 Bernhard Gruber (bgr) 101 (22889) 2013-04-21 01:54:49
#13 Paul Duplys (pd) 101 (1525) 2013-04-24 18:42:49
#14 Holti (Holti) 101 (6035) 2013-05-19 14:03:03
#15 Betty (St) 101 (101) 2013-05-21 00:21:04
#16 RPK (mysticraver) 101 (1694) 2013-05-21 14:22:28
#17 Luigi Tomelli (archstanton) 100 (127538) 2013-07-08 09:27:05
#18 Em Doulgerakis (Greko) 100 (193799) 2013-09-16 15:40:47
#19 Snake (snk) 100 (187783) 2013-12-03 14:27:07
#20 Alain (Integral) 100 (207924) 2014-01-08 12:21:43
#21 Karl Schutt (günter) 100 (44374) 2014-05-03 00:18:29
#22 Julia Bernotat (El Greco ) 100 (81129) 2014-08-30 21:41:08
#23 Robert (rm) 100 (56475) 2014-09-25 19:30:16
#24 Francisco Moraes (fmoraes) 100 (90044) 2014-12-07 06:01:29
#25 HolgerK (HolgerK) 100 (25776) 2015-01-11 00:50:33
#26 Dusan (xxdradus) 100 (40436) 2015-01-13 12:25:22
#27 Tom Tox (tox) 100 (17708) 2015-02-19 11:50:09
#28 Andreas Frerichs (Ossili) 100 (33266) 2015-03-26 21:56:37
#29 Hans Joachim Girulat (joregi) 100 (36278) 2015-07-16 14:07:22
#30 Joerg G. (SnifferMaster) 100 (18376) 2015-10-11 18:29:06
#31 Rainer Zufall (kiekuk) 100 (56786) 2016-01-13 16:33:22
#32 j.h. (haegarq) 100 (15452) 2016-03-30 11:21:15
#33 Martin (martinbucher) 100 (38365) 2016-11-01 12:07:48
#34 Alain Collignon (vexilla72) 100 (123666) 2016-11-17 11:39:41
#35 Dominik M. (Sgt. Pepper) 100 (128575) 2017-04-01 23:15:41
#36 sarah b (silva) 100 (52424) 2017-05-20 20:18:33
#37 D3d4lu5 (D3d4lu5) 100 (363488) 2017-06-19 12:05:39
#38 Eric (ExAstris) 100 (56037) 2018-06-01 02:23:36
#39 Michael (FoM) 100 (57794) 2018-12-19 00:14:22
#40 George (Theofanidis) 100 (137118) 2018-12-20 19:45:36
#41 Eugene (lim0n) 100 (199334) 2019-09-24 17:43:02
#42 Derek Hatton (alfred_noble) 100 (33998) 2020-02-23 23:37:56
#43 gordon (sir5) 100 (16181) 2021-04-26 07:16:44
#44 Michael Ammon (Ammonym) 100 (10120) 2021-04-27 22:23:40
#45 Claus Appelt (Konubixe) 100 (9647) 2021-05-23 17:51:09
#46 Antares (Antares) 100 (32880) 2021-07-20 19:26:15
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   +++    [22:12 - 18.10.2021] NikM solved the Level I challenge 'Wheatstone Cryptograph — Part 1'    +++    [18:43 - 18.10.2021] TaRaSS solved the Level I challenge 'Affine Codes / Modulo Arithmetic with N / Extended Euclid'    +++    [17:10 - 18.10.2021] tAnAs solved the Level I challenge 'Letter to the Templars — Part 2'    +++    [16:42 - 18.10.2021] TaRaSS solved the Level I challenge 'Beaver Code'    +++    [16:23 - 18.10.2021] TaRaSS solved the Level I challenge 'Number Sequence — Part 2'    +++