The ninth Dedekind number, then – still undiscovered by 2023, some 32 years after its predecessor was found – was overdue.

This week, try using rules of an existing board game to work out a hidden word, then move to a mathematical puzzle to determine the shares of pirates in a loot.

The Philadelphia Eagles defeated the Washington Commanders, 29-18, on Saturday to clinch back-to-back NFC East titles, ...