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Sixteen gears placed on a bracelet, grouped in sets of four.

Back in 2013, Ferdinand Lammertink showed Oskar a puzzle prototype of his, made of lego. His prototype featured eight large lego gears connected in a cylinder. Ferdinand called it Gear Bracelet. The puzzle could be scrambled by folding the bracelet flat, and turning four out of the eight gears. Then, like any twisty puzzle, the challenge is to solve it and get all eight gears back into their original orientation. Unfortunately, Ferdinand's prototype was a failure for two reasons. First of all, the puzzel was trivial to solve, as four adjacent gears could be trivially solved one by one, and then the other side happens to be solved as well. Secondly, the puzzle could be easily cheated, as gears disengage too quickly, and one could easily turn each gear individually. Ferdinand abandonned the idea, and unfortunately there exist no photos of his original prototype.

Gear Bracelet Double Row expands on this idea. Sixteen gears are placed on eight folding panels. The ring of panels can be folded so one set of eight gears can be turned independently of the other set of eight. The object is to restore the four squares. Each gear pair has a gear with 6 teeth, and one with 7 teeth. This way, each pair has the same number of possible orientations as a single 42-teeth gear, albeit much more compact. Like Ferdinand's original version, this one is also rather easy to solve. One can just solve each gear pair one by one, and once the first five gear pairs are solved, the other three are solved automatically as well.

Size: 32x56x109 mm

Weight: 84 grams

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