- Code: Select all

*--------------------------------------------------------------------*

| 9 245 2568 | 34 46x 345 | 1 3568 7 |

| 56 57 1 | 379 8 2 | 4 356 359 |

| 4568 3 5678 | 1 469x 4579 | 5689 2 589 |

|----------------------+----------------------+----------------------|

| 3468 47 3678 | 234 5 1 | 2368 9 2348 |

| 2 459 359 | 6 49 8 | 357 3457 1 |

| 34568 1 35689 | 29 7 349 | 23568 34568 23458 |

|-----------99-----------+----------------------+----------------------|

| 35 8 359 | 479 2 6 | 3579 1 3459 |

| 1 6 4 | 5 3 79y | 2789 78 289 |

| 7 259 2359 | 8 1 49y | 359 345 6 |

*--------------------------------------------------------------------*

The cell’s with (x) is an ALS as is the cell’s with a "y". At least, I think so. Here is the confusing part, the (4) in r1c6 is a restricted common, (4) in r3c6 looks like it could also be a restricted common and so is the (9) r3c6.

Here is the problem, it looks like either the (9) or the (4) could be the restricted common. You can exclude the (4) from r1c6 and the (4) from r3c6 but you cannot exclude the (9) from r3c6. In the future, how can I tell which candidate is the restricted candidate?. I must be missing something. Any help would be appreciated.