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With only two pieces, how difficult could the Rotor pocket puzzle be? Well, it may take you longer than you think to untangle the gold emblem from the silver one. This intriguing metal knot was created by the same engineer who brought us the Delta pocket puzzle. Both are similar in that once you take them apart, you’ll want to put them back together again just to appreciate the elegance of the solution.

Designed by Kyoo Wong of Hong Kong for Hanayama of Japan.

Difficulty: 6/6