This is the Geary Cube puzzle, another Bram and Oskar collaboration. It's externally identical to a Rubik's Cube, but has internal gearing which forces opposite faces to turn in opposite directions simultaneously. It's my favorite subgroup of the Rubik's Cube (you can try it yourself with a regular Rubik's Cube) and easily makes a bunch of pretty patterns. It's overall easier than a regular Rubik's Cube is, but the solution technique is very different and interesting and not related to the standard ways one solves twisty puzzles.
Geary Cube
This is the Geary Cube puzzle, another Bram and Oskar collaboration. It's externally identical to a Rubik's Cube, but has internal gearing which forces opposite faces to turn in opposite directions simultaneously. It's my favorite subgroup of the Rubik's Cube (you can try it yourself with a regular Rubik's Cube) and easily makes a bunch of pretty patterns. It's overall easier than a regular Rubik's Cube is, but the solution technique is very different and interesting and not related to the standard ways one solves twisty puzzles.
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