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A Crazy 3x3x3 with 2 circles on each face.
There are 2 types of turns on the Crazy 3x3x3. The inventor added another circle so there should be 4 types of turns. The Double Crazy Cube contains just 3 types of turns, because the designer considered one type of those turns as too hard to achieve.
Edge length: 60 mm
Weight: 107 grams
In the same months Evgeniy Grigoriev created his own version. Please refer to images 9-10.
In 2021 a mass produced version hit the market. See images 11-13. It bears the alternative name "Dana Cube".
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