Nintendo tumbler puzzle as an easter egg in the video game "". In WarioWare Gold, it appears as one of the microgames, in which you need to match 4 marbles in it. Nintendo tumbler puzzle The Nintendo tumbler puzzle, also known as the "Ten Billion Barrel" in English and originally in Japanese, is a mathematical puzzle in the style of Rubik's Cube. It was invented by Gunpei Yokoi of Nintendo in 1980 and was covered by (until the patent expired in March 1995 due to non-payment of a maintenance fee). It consists of a "cylinder" of transparent plastic divided into six levels, together
Altekruse Puzzle Altekruse Puzzle Altekruse Puzzle is a puzzle invented by Austrian inventor William Altekruse. The puzzle was first released in 1890 and has proved to be very popular ever since. The Universal Book of Mathematics provides the following information about Altekruse puzzle: "A symmetrical 12-piece burr puzzlefor which a patent was granted to William Altekruse in 1890. The Altekruse family is of Austrian-German origin and, curiously, the name means “old cross” in German, which has led some authors to incorrectly assume that it was a pseudonym. William Altekruse came to the United States as a young man in 1844 with his