The modern matchstick was invented in the early 1800s. The initial iterations suffered from assorted defects like violent flares, rancid chemicals, and a tendency to cause factory workers’ jaws to rot ...

Here are three matchstick puzzles to test your wits. Graphic: Jack Murtagh Move two matchsticks so that four one-by-one squares remain. The two matchsticks must be placed somewhere in the diagram and ...