This giant puzzle of a CMYK gradient may be the hardest we've ever seen

Just to let you know, if you buy something featured here, Mashable might earn an affiliate commission.
For some, jigsaw puzzles are a slow, relaxing pastime that exercise the creative and logic centers of the mind. For others, it's their version of a personal hell.
If you’re one of the former, it’s time you experienced Clemens Habicht’s 1,000 Colours. This is no ordinary jigsaw puzzle — because of the subtle changes in color, it’s a true test of patience, process, a