The worldwide numerical sensation remains the ultimate escape from the daily grind; all you need is a pencil America's Puzzlemaster Will Shortz provides 365 all-new sudoku to test your mettle-"Will Shortz Presents Sudoku 2015 Daily Calendar "is a full year of puzzle perfection Can you Sudoku? To solve or to savor, a daily sudoku puzzle guarantees perfect order at least once in your day. Who wouldn't like more of that?