The tetrahedral cousin of the Royal Skewb but invented earlier.

• Inventor: Andrew Cormier
• Mechanism: Corner turning hexahedron (other axis-system)
• Patents: Unknown
• Producer: Unknown
• Year: 2009
• Original Price: $57.00 USD
• Current Price: No Data

The Halpern-Meier-Tetrahedron is the tetrahedral transformation of the skewb. Analoguous to the Royal tetrahedron is a transformation of the Royal Skewb, a corner turning hexahedron with 4 cuts per throughgoing axis. This was the first puzzle with this kind of axis system and number of cuts. The Royal skewb (in hexahedral shape) was first published 2 years later.
The puzzle has the shape of a Reuleaux tetrahedron. This reduces the size of the puzzle drastically.

Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.

This puzzle can be found in collections of these members:

---

Found a mistake or something missing? Edit it yourself or contact the moderator.