The letters A, B, C and D mean "The loop turns left.", "The loop turns right.", "The loop runs straight forward." and "The loop doesn't use this vertex". You have to find out, how the letters correspond to these instructions.
Solution code: The sizes of the areas outside the loop, clockwise beginning in the upper left.
on 29. December 2011, 19:19 by CHalb
...
und dann noch den Rest der Rückfahrt. Schön war das!
on 20. December 2011, 09:01 by r45
Genial!
on 18. September 2011, 20:56 by ibag
Das freut mich! ;-)
on 18. September 2011, 15:21 by Micha
Schön, hat Spaß gemacht!
on 20. August 2011, 23:40 by pin7guin
Einfach klasse! Vor allem mit den Erkenntnissen vom anderen Elbschiffer... ;-)
on 6. August 2011, 10:53 by pokerke
Wow, this was a really great puzzle idea. I liked the previous one, but this one is even much more fun. I hope there will be more in this series.