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  2. Maze: Solve the World's Most Challenging Puzzle - Wikipedia

    en.wikipedia.org/wiki/MAZE:_Solve_the_World's...

    Maze: Solve the World's Most Challenging Puzzle (1985, Henry Holt and Company) is a puzzle book written and illustrated by Christopher Manson. The book was originally published as part of a contest to win $10,000. Unlike other puzzle books, each page is involved in solving the book's riddle.

  3. The Hardest Logic Puzzle Ever - Wikipedia

    en.wikipedia.org/wiki/The_Hardest_Logic_Puzzle_Ever

    The Hardest Logic Puzzle Ever is a logic puzzle so called by American philosopher and logician George Boolos and published in The Harvard Review of Philosophy in 1996. [ 1 ] [ 2 ] Boolos' article includes multiple ways of solving the problem.

  4. Cicada 3301 - Wikipedia

    en.wikipedia.org/wiki/Cicada_3301

    The stated purpose of the puzzles each year was to recruit "highly intelligent individuals", although the ultimate purpose remains unknown. [2] Theories have included claims that Cicada 3301 is a secret society with the goal of improving cryptography, privacy, and anonymity or that it is a cult or religion.

  5. Jigsaw puzzle - Wikipedia

    en.wikipedia.org/wiki/Jigsaw_puzzle

    The world's largest-sized jigsaw puzzle measured 5,428.8 m 2 (58,435 sq ft) with 21,600 pieces, each measuring a Guinness World Records maximum size of 50 cm by 50 cm. It was assembled on 3 November 2002 by 777 people at the former Kai Tak Airport in Hong Kong. [ 21 ]

  6. 2,022 jigsaw puzzles later, Carmel man owns Guinness World Record

    www.aol.com/2-022-jigsaw-puzzles-later-100325936...

    One Guinness World Record later and the basement of their Carmel home is filled with thousands of jigsaw puzzles. The cardboard puzzle boxes are neatly stacked floor to ceiling on 11 shelves.

  7. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    This is a list of puzzles that cannot be solved. An impossible puzzle is a puzzle that cannot be resolved, either due to lack of sufficient information, or any number of logical impossibilities. 15 Puzzle – Slide fifteen numbered tiles into numerical order. It is impossible to solve in half of the starting positions. [1]

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