The New Sudoku Players' Forum

[Jumper]

I recently came across a logical method I had not seen before and have not seen again. It might be seen as a "cheat" by some but I was pleased to find it. A partial diagram of the situation:

X X X X X X
X X 23 23 239 X
X X 23 23 X X

I realized the 9 could NOT be in the place it was posited. The puzzle would not be solvable if the 2 or 3 were not in that cell (the 239 cell).

This depends on whether the puzzle is solvable, which I assumed, as we do, that it was. The puzzle was solvable by more normal methods also.

[tso]

post cancelled

[PaulIQ164]

Yeah, the diagram was a little off I think. I assume what you meant to describe was the tactic where you have something more like

23 23
23 239

And you put the 9 in the bottom-right cell because otherwise there could be no unique solution. It's been described in a few threads already.

[Jumper]

Yeah, the diagram was a little off I think... more like

23 23
23 239

And you put the 9 in the bottom-right cell because otherwise there could be no unique solution. It's been described ...already.

[emm]

In my experience PaulIQ164 is usually correct, tso sometimes makes mistakes - but then he has a lot more than most of us going on in his head!