A face turning rhombic dodecahedron. The cut depth is so shallow that non-turning faces are visible.

• Section : Twelve-Sided: Rhombic Dodecahedron
• Inventor : Eitan Cher
• Mechanism : Edge turning hexahedron (axis system)
• Patents : Unknown
• Producer : Custom
• Year : 2009
• Original Price : Unknown USD

This is the third implemented face turning rhombic dodecahedron. The puzzles implemented beforehand are Toru and Rua. For this puzzle, masters were printed with an FDM printer and duplicates were made with casting. The geometry of its axis system is identical to that of an edge turning hexahedron. Like all puzzle with this geometry, it allows jumbling turns.
In the first eBay it netted 614 USD.

This puzzle was originally named simply "Face turning Rhombic Dodecahedron". In 2026 the inventor renamed it Tahi (Māori for "one") after a suggestion to follow Toru and Rua, also taken from Māori.

Piece type signature: HE2[F2 C2 E1 T6 X4][F2 C2]
Edge length: 50 mm
Weight: 171 grams

2021 Denis Mostunenko presented a stickerless version named "Rhodod FTO(rdinary)-3" with a 3D printed stand. See images 4-10.

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

This puzzle can be found in 8 collections of these members:

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