Calvins Puzzle TomZ Constrained Cube 270

Calvins Puzzle TomZ Constrained Cube 270

At first glance, it looks like an ordinary 3x3 cube in stickerless bright. The difference shows up as soon as you start turning. On the TomZ Constrained Cube 270, each of the six faces can only rotate within a 270-degree range. You can't make a full turn in one direction, because stops inside the cube won't let you. The puzzle was designed by Tom van der Zanden (hence "TomZ" in the name) and is mass-produced by Calvin's Puzzle.

How the 270° restriction works

The center of each face rotates around a gear mounted on the core, and that gear defines the range of motion. With 270 degrees, a face can reach all four positions, but sometimes you have to get there "the long way round". If U is blocked at a given moment, you do U' three times. Logically, it's still a regular 3x3, so you don't need any new algorithms. What changes is the execution: you have to keep track of where each face is within its range, and your learned fingertricks keep running into the stops. For anyone who solves the 3x3 from muscle memory, that's the main challenge.

Compared to other Constrained Cube versions

The series comes in several variants that differ in how far the faces can rotate:

• Constrained Cube 90: each face has only two positions, making it a completely different and much harder puzzle.
• Constrained Cube 180: faces rotate by half a turn at most.
• Constrained Cube 270: the gentlest of these versions, with the most freedom of movement.
• Ultimate and Mix versions: different restrictions on different faces.

Don't confuse this model with the 270 & 3x3x3 Hybrid version. There, only two faces are restricted and the mechanism is different.

Who is it for?

For people who can solve a 3x3 and want to try something different without learning a new method. It works well as an introduction to the Constrained series before the 180 and 90 versions, or as a prank gift for a speedcuber friend. It's a puzzle for collecting and fun, not for setting times. The cube has no magnets. If you're just learning to solve, a regular 3x3 cube will be a better choice.

Specifications

• Type: 3x3-based puzzle with restricted face rotation
• Manufacturer: Calvin's Puzzle
• Designer: Tom van der Zanden
• Restriction: all 6 faces, 270° range
• Magnets: none
• Finish: stickerless bright
• Weight: approx. 88 g (cube only)