Ready for a fresh set of puzzles? Click here for the September/October 2024 Puzzle Corner, brought to you by guest editor Edward Faulkner '03.

Ready for a fresh set of puzzles? Click here for the July/August 2025 Puzzle Corner,brought to you by guest editor Ed Faulkner '03. Send problems, solutions (by August 1), and comments to puzzlecorner@technologyreview.com. Editor emeritus Allan Gottlieb '67 launched Puzzle Corner in 1966. Find back issues through 2022 atcs.nyu.edu/~gottlieb/trand more recent back issues attechnologyreview.com/puzzle-corner.