Sudoku sharpens wits without math

Software developer Jeff Grovesner picked up a copy of USA Today, and snagged on a Japanese-sounding game he’d never heard of before. It sucked him into another sphere of consciousness. When the 52-year-old Palm Bay, Fla., resident was finished, nearly six hours of his life were missing.

Grovesner says, ‘I managed to solve the problem.’

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