The puzzle is similar to the Rubik's Cube in that the objective is to manipulate the puzzle until all sides are uniform in colour. The puzzle itself forms a triangular pyramid, so that there are four sides and colours.
Unlike the Cube, the Triamid is easy to disassemble as it is made of ten individual pieces (each with four coloured sides) and four joining sections. Following the rules, to solve the puzzle the user must remove a small pyramid (of four pieces) from any of the four end points, rotate it, and reattach it.
The puzzle is superficially similar to the Pyraminx but, unlike that puzzle, it is possible to move pieces between a side and a corner position.
Each piece of the puzzle has four faces. Of the ten pieces:
- six pieces have two colours, and
- four pieces have three colours (that is, they have only one colour repeated).
In the solved state, the four pieces with three colours must lie on the end points of the pyramid.
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