The 10 Hardest Logic Puzzles Ever Created - Conceptis …
Jul 25, 2013 · For more information about this project and other logic puzzles visit my website Calcudoku.org. 1. The World's Hardest Sudoku. Sudoku is easily the most played and most analyzed puzzle in the world, so coming up with the hardest one is no mean feat. In 2012, Finnish mathematician Arto Inkala claimed to have created the "World's Hardest Sudoku".
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