The passcode 9re7chapeaut5w3r was finally solved and redeemed yesterday. But there were lot questions how it was decoded. And today we got email from Didactylos explaining the process:
The source is actually HyLetter1 clue from 25 December 2012, on 5th page you can barely see code:
The latest chapeau code is from the Christmas day 16×4 block. I thought you might like the solution, since it took so long to crack.
Rotate block 90 degrees to give
These correspond with postal districts in Switzerland. Postal codes are 4 digits, but the district or area part is the first 2 digits. E.g. DAVO = 72 (7272 Davos Clavadel). This gives:
39 72 65 37 63 68 61 70 65 61 75 74 35 77 33 72
This is hex, and converts to 9re7chapeaut5w3r