"It's saving both time and money." Researchers use Hollywood-inspired 3D printout to test massive energy machine: 'The best ...

Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...

Solve the grid in this hard Sudoku puzzle! The objective of Sudoku is to fill each row, column and sub-grid with exactly one of each number from 1-9. A conflict arises if you repeat any entry in ...

Need more to satisfy your sudoku craving? Subscribers can play every puzzle in our archives — start on the easy sudoku level, slide into the medium-difficulty puzzle level, then step up to hard sudoku ...

If your morning starts with a litany of daily puzzles and word games, now is a great time to add USA TODAY Play's games to your roster.. Less stressful than many other crossword puzzles on the ...