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An assembled six-piece burr. The six-piece burr, also called "Puzzle Knot" or "Chinese Cross", is the most well-known and presumably the oldest of the burr puzzles. This is actually a family of puzzles, all sharing the same finished shape and basic shape of the pieces. The earliest US patent for a puzzle of this kind dates back to 1917. [8]
Pentangle's first product was a burr puzzle, the Woodchuck puzzle, whose object was to assemble 24 wooden pieces into an octahedral shape. It sold hundreds of thousands of these. [ 1 ] Pentangle eventually made a total of 314 different burr puzzles, and from 1979 made and sold the "Chinese Cross", a compendium of 42 pieces including all the ...
A puzzle ball on display at the Overseas Museum, Bremen. A Chinese puzzle ball, sometimes known as a devil's work ball (Chinese: 鬼工球; pinyin: guǐ gōng qiú) or the Concentric Ball (Chinese: 同心球; pinyin: tóng xīn qiú), is a Chinese-made artifact that consists of a number of intricately carved concentric hollow spheres carved from a single solid block that fit within one another ...
A holey burr puzzle is characterised by internal holes, which usually allow for sliding movements of individual pieces or groups of pieces. The level of a holey burr puzzle specifies how many sliding movements are necessary to assemble or disassemble the puzzle. Commercial Name: Minus Cube Piece configuration: 2×2×2-1 sliding cubes
A noteworthy puzzle, known as the Chinese rings, Cardans' rings, the Baguenaudier or the Renaissance puzzle was mentioned in circa 1500 as Problem 107 of the manuscript De Viribus Quantitatis by Luca Pacioli. The puzzle is again referred to by Girolamo Cardano in the 1550 edition of his book De subtililate. Although the puzzle is a ...
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Calvin's Puzzle [1] Commercial Cyclone Boys [2] Commercial DaYan DaYan Cube [3] Commercial DaYan is known for the Dayan Zhanchi. Although obsolete today, the cube was the first to use a "torpedo" design within its pieces. This prevented the cube from popping and corner twisting. Nearly every speed cube in existence today uses this design. Eastsheen
Tiny, cheap and easy to install, they are being imported from China, but also are being made with 3D printers. A modified gun used to shoot at police in Pittsburgh. (Alleghany County District ...