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A custom sticker variant showing six different 2D-barcodes.
One of the challenges creating this puzzle was to guarantee that it is still possible to read the code.
The pixels shown on the code are unfortunately not divisable by 3 in all cases: the resolution of the 2d code depends on the length of the coded information.
Because the puzzle has some faces with more, some with less text, the pixels are of different size. This helps(?) solving it. To make it reasonably easier, the inventor decided to print one side with blue stickers.
One issue will remain: the correct orientation of the centers.
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