Puzzles don’t just make for a fun rainy day activity. Research shows there are mental benefits to filling in the correct numbers and letters in the blocked grids of Sudoku and crossword puzzles.

LinkedIn is bringing out a miniature version of Sudoku, built with a three-time world Sudoku champion Thomas Snyder and the Japanese publisher that popularized the puzzle. Millions of people already ...

Add Yahoo as a preferred source to see more of our stories on Google. Daily puzzlers would be quick to tell you that sudoku, Wordle’s mathematical cousin, is not as easy as it looks. The small grid, ...