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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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 Posted: Mon Dec 21, 2009 2:15 am Post subject: Same new source has me stumped too |
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This is rated .92 and all I've been able to do is two ERs and an XYZ.
| Code: |
+---------------+---------------+--------------+
| 269 7 46 | 3 2689 2689 | 249 5 1 |
| 8 249 5 | 1 29 279 | 2479 3 6 |
| 3 129 16 | 57 2569 4 | 279 27 8 |
+---------------+---------------+--------------+
| 269 1249 1467 | 689 3 5 | 12 168 279 |
| 269 3 8 | 69 7 1 | 5 4 29 |
| 5 19 167 | 2 4 89 | 138 168 379 |
+---------------+---------------+--------------+
| 1 8 239 | 4 269 269 | 237 27 5 |
| 7 5 29 | 89 1289 3 | 6 18 4 |
| 4 6 23 | 57 158 78 | 18 9 23 |
+---------------+---------------+--------------+
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Play this puzzle online at the Daily Sudoku site |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Mon Dec 21, 2009 6:50 am Post subject: |
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| Code: | +-----------------+--------------------+------------------+
| 269 7 (46) | 3 2689 2689 | 29(4) 5 1 |
| 8 249 5 | 1 29 29(7) | 29(47) 3 6 |
| 3 129 1(6) | 57 29(56) 4 | 279 27 8 |
+-----------------+--------------------+------------------+
| 269 1249 1467 | 689 3 5 | 12 168 279 |
| 269 3 8 | 69 7 1 | 5 4 29 |
| 5 19 167 | 2 4 89 | 138 168 379 |
+-----------------+--------------------+------------------+
| 1 8 239 | 4 269 269 | 237 27 5 |
| 7 5 29 | 89 1289 3 | 6 18 4 |
| 4 6 23 | 57 (158) -7(8) | (18) 9 23 |
+-----------------+--------------------+------------------+ |
(8)r9c6 = [hidden pair(18)r9c57] - (5)r9c5 = (5-6)r3c5 = (6)r3c3 - (6=4)r1c3 - (4)r1c7 = (4-7)r2c7 = (7)r2c6; r9c6 <> 7
this hinges around the almost hidden pair {1,8} in r9c57
if the 8 is true in r9c6, then obviously the 7 is false...
but if the 8 in r9c6 is false, then the hidden pair {1,8} is true in r9c57 and you can follow the chain around to see that the 7 still can't exist in r9c6. |
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