Cube Folding Font

by Oswin Aichholzer, Hugo Akitaya, Kenneth Cheung, Erik Demaine, Martin Demaine, Sándor Fekete, Linda Kleist, Irina Kostitsyna, Maarten Löffler, Zuzana Masárová, Klara Mundilova, and Christiane Schmidt, 2019


Each letter in this font is a cube folding puzzle: it is possible to fold the letter into a 1 × 1 × 1 cube by folding only along grid lines, but doing so can be quite challenging. Each letter/puzzle is a rectangle with one or more slits (cuts). To try out a puzzle, cut out a rectangle and the slits indicated, precrease the grid lines, and try to make a cube. Every puzzle is designed so that at least one of the slits is necessary, meaning that the puzzle is unsolvable without it.

If you enjoy these puzzles, you might check out several more cube folding puzzles we have prepared.

For more information about what shapes fold into a cube, see our 2021 paper “Folding Polyominoes with Holes into a Cube” (which also presents this font).

Check out other mathematical and puzzle fonts. • Feedback or not working? Email Erik. • Source code on GitHub.