Ultimate Helicopter CubeAn Ultimate Helicopter Cube. The stickers are handmade in the style used first for the Ultimate Cube.
UltimatestarA compound of Ultimate Skewb (hence the name) and Icosahedron Skewb.
Ultra-XThe first puzzle which implements three axis systems in one.
UltraMorph EggA 5x5x5 transformed into an egg oriented from corner to corner.
UltramorphixA 5x5x5 modified into a truly tetrahedral shape.
Unicorn 2x2x2The Unicorn implemented with a 2x2x2 instead of a 3x3x3.
Unique-1A truncated and extended 3x3x3. The cuts are placed arbitrary by purpose.
Unique-2A truncated and extended 3x3x3 without any kind of symmetry or regularity.
Unique-3A skewb in a convex but random shape with twelve sides.
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