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Photo: DER SPIEGEL
The summer party of the club of clever problem solvers is coming up.
The board of directors sent the invitations by email.
This includes a mysterious access card - a checkered area on which two small rectangles and three small squares are placed.
The card is somewhat reminiscent of a QR code to be scanned.
But that's not what it is intended for.
Rather, the image contains a secret password that club members must name at the entrance.
Can you decrypt the code?
Note:
The best way to crack the code is to access the puzzle with a mobile phone or tablet.
The code word is
TAHITI
.
It becomes visible when you tilt the display back almost 90 degrees and then look at it from below from a very acute angle.
The best thing to do is to close one eye.
The thin horizontal lines can then practically no longer be seen.
To do this, the small rectangles and squares shrink into horizontal lines.
Vertical lines, on the other hand, remain visible even from an acute angle, they only appear much shorter.
The unusual puzzle goes back to the puzzle collector and inventor Martin Gardner.
I found it in Heinrich Hemme's book "222 puzzles for every occasion".
If you missed a puzzle from the past few weeks, here are the ten most recent episodes:
Who lies?
Who is telling the truth
How does the sequence of numbers continue?
The round is in the square
The magic number triangle
Built on a gap
The racing bike clique
A king on the run
The carpet repair
Brand diversity at Swiss Post
Is Dieter the thief?
