A puzzle during a lectureSourced
Seven pieces came from a quantum-mechanics lecture
Piet Hein devised the Soma cube in 1933 during a quantum-mechanics lecture by Werner Heisenberg. Its seven distinct pieces can be assembled into a three-by-three-by-three cube. The setting for an abstract lecture produced a tangible arrangement problem.
An idea from the lecture room could be worked on with the hands.
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Soma cube · Wikimedia contributors
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Reviewed: 2026-10-05