Online since 2002. The most comprehensive site for all around twisty puzzles.

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Odd CubeA piece shufle of a 3x3x3 and a newly designed spherical 3x3x3.
Off Center CylinderA cylindrical 2x2x2 with midturn shape.
Offset 2x3x3The concepts of the I-Cube and the One-plane-bumped-cube combined.

Offset 4x4x4A 3x3x3 with additional cubies, pretending to be a 4x4x4.
Offset SkewbA Skewb with rectangular centers and four enlarged corners.
Okki Gem IIA 2x2x2 Octahedron, also called a Gem or Okki, but with a colour pattern reminiscent of the Alexander's Star puzzle.

Oliloy cubeA 3x3x3 with two opposite truncated corners, together with its 3 surrounding edges and diagonal cuts in 6 edges and 6 corners.
OlimpicA custom built puzzle with an Olympic Rings theme.
Olmeca headIts a 2x2x2 designed to honor the Olmec culture

Olympic Mascot Micro MagicJuozas Granskas's 3-panel Magic. Complete all three Olympic mascots at the same time.
Olympic Rings (circles)Five intersecting circles with a puzzle theme based on the Olympic Rings.
Olympic Winter Games in Sochi 2014A 2D sliding piece puzzle with 19 pieces, one hole and several bandages.

One Circle - Two Circles24 marbles in 6 colours which can be moved in either one closed loop or twi distinct circles.
One Layer Dodecagonal PrismThe one layered cousin of the three-, four- and two-layered variants. Made from a puck.
One Layer Hexagonal PrismThe one layered cousin of the three-, four- and two-layered variants. Made from a puck.


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