| Answer | Crossword Clue |
|---|---|
| SOMA | ... cube (popular 1960s puzzle) |
| SOMA | ... cube (popular 60's-70's puzzle) |
| RUBIK | Puzzle cube inventor |
| SOMA | Puzzle cube before Rubik's |
| ERNO | Puzzle cube inventor Rubik |
| ERNO | Puzzle cube creator Rubik |
| RUBIK | Puzzle cube inventor Erno |
| SOMA | ... cube (3-D puzzle) |
