Online since 2002. Over 3300 puzzles, 2600 worldwide members, and 270,000 messages.

Pantazis Constantine Houlis
AbyssA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 8-cell (also known as Hypercube or Tesseract)
AfroditeA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope rectified 5-cell (also known as Tetroctahedric)
AquadronWorld's first rotational-gravity puzzles based on a cubic structure. This puzzle is filled with water.

ArgoA puzzle which is based on the sixth dimensional symmetry of the 6-Simplex.
CerberusSix telescopic rods have to be arranged into a pentagram.
ChronosA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 5-cell (also known as Pentachoron)

ColossusA puzzle which is based on the fourth dimensional symmetry (edge-transitivity) of the 4D polytope 24-cell (also known as Icositetrachoron)
CosmosThis puzzle pretends to be based on a 4D polytope but it is not. Instead it is a cube with its antipodes connected.
Cubedron ClassicA rotational-gravity puzzles based on a cubic structure.

Cubedron StandardA rotational-gravity puzzles based on a cubic structure.
CybedronA sticker variant of the cubedron. It uses only two colors but is equally difficult.
Di-CubeA custom Magic with 12 tiles and two solutions.

EledoneA 5-tiles-Magic named after "Eledone Moschata"
Escape from AtlantisOne sample of a magic-myth-puzzle which is a RubiksMagic with an odd number of tiles. This one has 9 tiles.
Flexible TetragonA 8-tile-magic stringed in a way that it enables a state impossible to the normal 2x4-magic.


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