The Diabolical Cube

This is believed to be the oldest puzzle of its type, offered by Angelo Lewis in 1893.

“Of these six segments the experimenter is required to form a cube.”

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This solution is by CMG Lee: Image: Wikimedia Commons Pleasingly, the six pieces contain 2, 3, 4, 5, 6, and 7 cubical cells. 01/31/2025 UPDATE: Reader Jon Jerome sent me this beautiful hand-crafted version, following Lewis’ design. It makes a great puzzle — the degree of challenge is just right, and the target object is beautifully simple. Thanks, Jon!