SUDOKU
6 letters
Historical clue formulations
- Puzzle type that was the Oxford Dictionaries' 2005 U.K. "word of the year" — 2025-11-30
- Puzzle craze of 2006 — 2023-04-11
- Puzzle with a 9 x 9 grid — 2022-05-09
- Numbers game — 2019-03-14
- With 67-Across, what the circled part of this crossword represents — 2017-04-27
- Numbers game? — 2017-01-06
- Numerical puzzle with a 9x9 grid — 2014-09-22
- Craze of 2005-06 — 2011-07-15