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Decision question (Friedman, 2002): Does a given instance of Corral Puzzle have a solution? [1] This decision question is NP-complete. This is proven by reducing the decision problem of deciding the 3-colorability of a planar graph, which is known to be NP-complete, to a Corral Puzzle.
Whether it’s their craftsmanship, rarity, or the story behind them, these puzzles are worth far more than their original price. Here are 15 of the rarest and most expensive ones on the market. 1.
Thanks to the puzzle’s enduring popularity, early models — especially those in original packaging — can sell for around $100, especially in mint condition. 9. Fisher-Price Little People Playsets
The first three volumes of the series were originally released as "Usborne Solve It Yourself". Each book contains a vividly illustrated story, with a plot-related puzzle to solve on each double page. The series's success inspired the creation of three related series: Advanced Puzzle Adventures, Young Puzzle Adventures and Science Puzzle Adventures.
Puzzle Uo Poko was solely designed by Toshiaki Tomizawa, a co-founder of Cave whose previous works include the DonPachi series. [5] [6] [7] Puzzle Uo Poko was released in Japanese arcades by Jaleco in February 1998. [8] Unlike several other releases by Cave, Uo Poko remained exclusive to arcades and did not see a contemporary port for a home ...
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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 ...
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