The New Sudoku Players' Forum

[dpletcher]

What next step am I missing here? I've been looking at this one for a month.


*----------------------------------------------------------------------------*
| 7 9 2345 | 15 125 6 | 1234 123 8 |
| 24 1245 6 | 3 12589 28 | 1249 129 7 |
| 8 123 23 | 19 7 4 | 6 5 39 |
+--------------------------+-------------------------+---------------------|
| 1 23457 8 | 459 259 237 | 39 6 45 |
| 234 23457 234579 | 6 12589 2378 | 139 1389 45 |
| 34 6 3459 | 1459 1589 38 | 7 1389 2 |
+--------------------------+-------------------------+---------------------+
| 6 8 1 | 7 4 5 | 239 239 39 |
| 9 24 24 | 8 3 1 | 5 7 6 |
| 5 37 37 | 2 6 9 | 8 4 1 |
*--------------------------+-------------------------+---------------------*

[Ruud]

Hi,

A month

Just check a Line-Box-Interaction between row 3 and the top-left 3x3 box.

Ruud.

[Shazbot]

I believe what Ruud is referring to is commonly called Locked Candidates - one number in row 3 can only be placed in box 1, which allows you to eliminate that number from the remaining cells in box 1.

[dpletcher]

Hey guys, thank you for your help last week. I was able to solve that one in a few minutes with your excellent help.
Here is another one that I've been working on for about a month and can't make any headway on it. What is my next move?


*-------------------------------------------------------------------*
| 126 4 8 | 67 9 367 | 1235 1235 235 |
| 169 5 13 | 8 2 36 | 7 134 349 |
| 29 239 7 | 5 4 1 | 239 6 8 |
+---------------------+-------------------------+------------------|
| 3 8 59 | 269 1 69 | 4 7 256 |
| 7 6 2 | 3 5 4 | 8 9 1 |
| 4 1 59 | 269 7 8 | 235 235 2356 |
+---------------------+-------------------+-----------------------+
| 8 7 6 | 4 3 59 | 1259 125 259 |
| 159 39 4 | 179 6 2 | 359 8 3579 |
| 1259 239 13 | 179 8 579 | 6 345 34579 |
*-------------------------------------------------------------------*

Nay help will be much appreciated.

[CathyW]

I think you'll have trouble with this one - I pasted your grid into Sadman Sudoku and apparently it has 9 solutions!