Related Clues:
- See 16
- Prose form that gives difficulties
- 'In' game with which to monkey puzzle
- In response, fires operative back a difficult question
- Model problem
- Machine with gamma for chi when deciphered
- Play in game with variations
- Puzzle resolved in game
- ... which name disclosed a machine used in war
- Variation in game puzzles people
- Heartless meaning could be a riddle
- Model conundrum
- Awful person with no end of affectation?
- A hard question for one, a sitter for another
- Imagine not one, perhaps, but many variations