This Cube 21 only has 2 colours, one of which is always silver.

• Inventor : Dr. Vojtech Kopsky, Dr. Harel Hrsel
• Mechanism : Square-1 (3 layers)
• Patents : CS9005504, D340093, US5193809
• Producer : Unknown
• Year : 1999
• Original Price : Unknown USD
• Average Price : Unknown USD

This version was initially produced in 1999 in the Czech Republic by the original inventors Hrsel and Kopsky. The name "Cube 21" means "cube for 21th century".

This exceptional brain teaser can be changed in various configurations, from a cube to a star and more than 200 other shapes. The total number of configurations of Original edition equals 552,738,816,000 and of Silver edition equals 34,546,176,000.

Recommended by Mensa Czech Republic as the brain teaser developing cubic imaginations, combination skills and logical thinking.

This Cube 21 only has 2 colours, one of which is always silver. The second colour can be any of the other five Original Edition colours: blue, orange, green, yellow, red.

Edge length: 55 mm
Weight: 74 grams

Thank you to the following people for their assistance in helping collect the information on this page: Carter, Geert Hellings, Arnoud Blees, Ton Dennenbroek.

This puzzle can be found in 25 collections of these members:

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