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ā€˜Amazingā€™ Sudoku trick even 'best solvers' don't know and can find answer for 'extreme' problem
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"Iā€™m a nearly 80-yo retired aerospace engineer. These puzzles, along with a game of chess now and then, are my brain exercises. Your tutorials and challenging puzzles are teaching me more about a simple, yet difficult, puzzle. Thank you for the effort."

- Mike Mott
Smartie Party Member

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Help prevent dementia by up to 20 years and save on memory care costs

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