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Impossiball
The Impossiball is a rounded icosahedral puzzle similar to the Rubik's Cube. It has a total of 20 movable pieces to rearrange, same as the Rubik's Cube, but all of the Impossiball's pieces are corners, like the Pocket Cube. == History == William O. Gustafson applied for a patent for the Impossiball design in 1981 and it was issued in 1984.〔(Impossiball patent )〕 Uwe Mèffert eventually bought the rights to some of the patents and continues to sell it in his puzzle shop under the Impossiball moniker.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Impossiball」の詳細全文を読む
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