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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 combination puzzle, also known as a sequential move puzzle, is a puzzle which consists of a set of pieces which can be manipulated into different combinations by a group of operations. Many such puzzles are mechanical puzzles of polyhedral shape , consisting of multiple layers of pieces along each axis which can rotate independently of each ...
Wire puzzles, or nail puzzles consist of two or more entangled pieces of more or less stiff wire, metal rods, or bent nails. The pieces may or may not be closed loops. The closed pieces might be simple rings or have more complex shapes. Normally the puzzle must be solved by disentangling the two pieces without bending or cutting the wires. [10]
A solution to Hoffman's packing puzzle with 4×5×6 cuboids (1), exploded to show each layer (2) The image shows an example of Hoffman's packing puzzle . The aim is to pack 27 cuboids with side lengths A , B , C {\displaystyle A,B,C} into a box of side length A + B + C {\displaystyle A+B+C} , subject to two constraints:
The Universal Book of Mathematics provides the following information about Altekruse puzzle: [2] [3] A symmetrical 12-piece burr puzzle for 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 ...
Chess puzzle. Chess problem; Computer puzzle game; Cross Sums; Crossword puzzle; Cryptic crossword; Cryptogram; Maze. Back from the klondike; Ball-in-a-maze puzzle; Mechanical puzzle. Ball-in-a-maze puzzle; Burr puzzle; Word puzzle. Acrostic; Daughter in the box; Disentanglement puzzle; Edge-matching puzzle; Egg of Columbus; Eight queens puzzle ...
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