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SOMA 7 pieces

Soma cube: 69 figures

Every figure is built with the seven Soma pieces: all 27 cubes, none left over and none missing. Look at the figure, try to build it and, if you get stuck, open the solution.

See the 69 challenges

The seven pieces

One piece of three cubes and six of four, none of them straight. Together they make a 3 × 3 × 3 cube, in 240 different ways. Piet Hein invented them in 1933.

The figures are sorted by difficulty: the fewer ways to build them, the harder. We counted the solutions with our own program, not counting turns or mirror images.

Soma cube videos on YouTube

Intermediate 16 figures · 16 with a video

From 60 to 199 ways to build them.

Hard 13 figures · 13 with a video

From 8 to 59 ways: you have to think where each piece goes.

Expert 18 figures · 18 with a video

Fewer than 8 ways, and three of them with only one.

Prefer paper?

Cubo SomaDownload the PDF guidePDF · 14 pages · 2.5 MB · in Spanish