19A. This clue includes two qualifiers, not one. The [Northernmost city in North America with over one million people] is ...

Will solving Sudoku help stave off Alzheimer's? It makes sense in theory, but there are many variables and results are almost ...

Solving puzzles daily is a fun and easy way to boost your brain health. Not only does it keep your mind sharp, but it also ...

Mathematicians say a hidden pattern called the 'Phistomefel Ring' can help you solve even the most challenging Sudoku puzzle ...