Replace the letters by digits 0-9. Equal letters mean equal digits, different letters mean different digits.
The resulting clues for the Hochhaus-puzzle (Anleitung) are "knapp daneben", i.e. too small or too large by 1.
Solution code: The diagonals, first from top left to bottom right, then from top right to bottom left.
on 12. July 2014, 21:49 by ibag
Typo fixed.
on 5. February 2014, 09:12 by pin7guin
Mit den Erkenntnissen von der ABC-Box mit Hochhauskern (2) geht es prima. :-)
on 3. February 2014, 13:54 by Eisbär
Tricky, but I liked it :-D