IcosaixA face turning icosahedron. Not the first one but the first to reveal the jumbling geometry of this type of puzzles.
Illegal CubeA pentagonal prism which ignores geometric rules.
Impossible TwistA deeper-than-origin puzzle inspired by the impossible dovetail object.
Incomprehensible CubeA physical implementation of (UD', L, Ls, Fs). A 3x3x3 with a coupled pair of edges and two opposing sides coupled.
InvertiminxA megaminx, reduced to three sides, was turned inside-out.
Jack's CubeA puzzle which combines three different concepts in one puzzle.
Jumble CloudA 2D-jumbling puzzle to make many others obsolete.
Jumble DiamondA unique, near-jumbling-only twisty puzzle with a previously non-specified geometry.
Jumble IntersectTwo 2x2x2s (rotated with respect each other) fused into one puzzle.
Jumble PebbleA jumbling only puzzle with a strange yet unnamed geometry. It resembles the jumble rock.
Jumble PrismAn idea of Bram Cohen finally comes to life after 5 years.
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