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The solver must cut out the three rectangles and reassemble the pieces so that the two jockeys appear to be riding the two donkeys. Famous Trick Donkeys is a puzzle invented by Sam Loyd in 1858, [ 1 ] first printed on a card supposed to promote P.T. Barnum 's circus.
A Heyawake puzzle. Heyawake (Japanese: γΈγγγ, "divided rooms") is a binary-determination logic puzzle published by Nikoli. As of 2013, five books consisting entirely of Heyawake puzzles have been published by Nikoli. It first appeared in Puzzle Communication Nikoli #39 (September 1992).
A dropquote puzzle. Dropquote or quotefall is a puzzle type where a quotation has been written over several lines, and the solver must recreate it from only a list of letters as they should appear in each column. When correctly completed, the words read from left to right to form a quotation, proverb or saying.
Like many other combinatory and logic puzzles, Masyu can be very difficult to solve; solving Masyu on arbitrarily large grids is an NP-complete problem. [2] However, published instances of puzzles have generally been constructed in such a way that they can be solved in a reasonable amount of time.
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The Nine Dots Prize, named after the puzzle, [23] is a competition-based prize for "creative thinking that tackles contemporary societal issues." [ 24 ] It is sponsored by the Kadas Prize Foundation and supported by the Cambridge University Press and the Centre for Research in the Arts, Social Sciences and Humanities at the University of ...
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A Sudoku starts with some cells containing numbers (clues), and the goal is to solve the remaining cells. Proper Sudokus have one solution. [1] Players and investigators use a wide range of computer algorithms to solve Sudokus, study their properties, and make new puzzles, including Sudokus with interesting symmetries and other properties.