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2. 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. A translation in Italian was published earlier in the newspaper La Repubblica, under the title L'indovinello ...

3. List of impossible puzzles - Wikipedia

   en.wikipedia.org/wiki/List_of_impossible_puzzles

   15 Puzzle – Slide fifteen numbered tiles into numerical order. Impossible for half of the starting positions. Five room puzzle – Cross each wall of a diagram exactly once with a continuous line. MU puzzle – Transform the string MI to MU according to a set of rules. Mutilated chessboard problem – Place 31 dominoes of size 2×1 on a ...

4. Eternity puzzle - Wikipedia

   en.wikipedia.org/wiki/Eternity_puzzle

   The Eternity puzzle is a tiling puzzle created by Christopher Monckton and launched by the Ertl Company in June 1999. It was marketed as being practically unsolvable, with a £1 million prize on offer for whoever could solve it within four years. The prize was paid out in October 2000 for a winning solution arrived at by two mathematicians from ...

5. Free Online Puzzle Games - No Downloads - AOL Games

   www.aol.com/games/puzzle

   Enjoy classic board games such as Chess, Checkers, Mahjong and more. No download needed, play free card games right now! Browse and play any of the 40+ online card games for free against the AI or ...

6. Play Simply Jigsaw Online for Free - AOL.com

   www.aol.com/.../play/masque-publishing/simply-jigsaw

   Simply Jigsaw. Piece together a new jigsaw puzzle every day, complete with themes that follow the seasons and a super useful edges-only tool. By Masque Publishing. Advertisement.

7. Jigsaw puzzle - Wikipedia

   en.wikipedia.org/wiki/Jigsaw_puzzle

   Jigsaw puzzle. A jigsaw puzzle (with context, sometimes just jigsaw or just puzzle) is a tiling puzzle that requires the assembly of often irregularly shaped interlocking and mosaicked pieces, each of which typically has a portion of a picture. When assembled, the puzzle pieces produce a complete picture. In the 18th century, jigsaw puzzles ...