KOAN
Set to 4 different clues across 4 published puzzles, most often "What is the sound of one hand clapping?," say — The New York Times, Sunday, 14 February 2010.
4 letters
Every clue on record, most used first
- "What is the sound of one hand clapping?," sayonce
The New York Times — Sunday, 14 February 2010
- Zen questiononce
The New York Times — Thursday, 20 April 2006
- Zen master's questiononce
The New York Times — Friday, 29 March 2002
- Zen riddleonce
The New York Times — Wednesday, 21 March 2001