FIDE
Set to 4 different clues across 4 published puzzles, most often “World chess org.” — The New York Times, Thursday, 28 September 2000.
4 letters
Every clue on record, most used first
- World chess org.once
The New York Times — Thursday, 28 September 2000
- Worldwide chess org.once
The New York Times — Saturday, 22 May 1999
- Bona ___once
The New York Times — Tuesday, 8 April 1997
- Bona ____once
The New York Times — Monday, 6 November 1995