Sysudokie Sunday breakfasts were shaken up February 4 by the Sudoku in the TV Times, which unaccountably defied the bypass. Accustomed to dusting this one off as a warm up, many wound up with an unwelcomed cloud on the amply sized grid, and spending surprising amount of time getting to a solution.
Forget about 3-fills. Starting with the grid in the previous post, the scan of numbers produces a trace of
and this grid.
Now you have to recognize that the c5 5-fill gives a hidden single 8. Put that in and rescan 1 – 9, for three more clues.
Here is the trace, . . .
. . . and the grid at the naked single point of collapse. Who would’a thought?
We’re spending some in March with Rebecca Bean’s Extremely Hard Sudoku, v.10, and you’re invited to the preview, with her second highest rated puzzle I-34.