It reportedly took him a month to solve his own puzzle
Else clues• 1980 fadmaker
• 1980s craze starter
• Big name in puzzles
• Creator of a popular six-color puzzle
• Cube creator
• Cube creator Erno
• Cube dude
• Cube inventor
• Cube puzzle inventor
• Early 1980's craze maker
• Famed cube creator
• Hexahedral puzzle inventor
• His cube was a craze
• His toy has more than 43 quintillion combinations
• Honorary head of the Hungarian Engineering Academy
• Hungarian cubist
• Hungarian cube maker
• Inventive cubist?
• Inventor of a rotatable cube
• Inventor of the Cube
• Man with a cube
• Noted cubist?
• Puzzle cube inventor
• Puzzle fad inventor
• Toy cube inventor