The (Classic Doyle) Howdunnit Formula

Solving “impossible crimes” was one of the things Holmes was most famous for, and Doyle was fond of coming up with puzzles to challenge his great creation. In fact, a good way to think of a howdunnit is as it being a puzzle.

“How did the killer get in and out of the locked safe with guards around it?”

“How did the thief cover the distance between a party and the crime scene faster than a car can travel?”

“How did the victim die without leaving any evidence behind?”

The answers to...