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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Thu Aug 09, 2007 8:43 pm Post subject: A Lesser Challenge |
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Again no HV, so I tinkered with this one.
After x-wings of <1> and <7>, I was stalled.
Then a forcing chained opened the puzzle.
If R9C2 is either 1 or 7, R5C3 must be 6.
Is there a more logical path than a forcing chain here?
Forcing chains seem like "wild guesses."
Thanks,
Earl
| Code: |
+-----------------+--------+---------------+
| 345 1345 8 | 9 7 6 | 2 1345 135 |
| 2479 147 129 | 3 5 8 | 146 1479 1679 |
| 3579 6 59 | 4 1 2 | 35 8 3579 |
+-----------------+--------+---------------+
| 68 2 7 | 16 4 5 | 9 13 1368 |
| 1 9 56 | 8 3 7 | 56 2 4 |
| 4568 45 3 | 16 2 9 | 7 15 1568 |
+-----------------+--------+---------------+
| 357 8 15 | 2 9 4 | 135 6 1357 |
| 23569 35 2569 | 7 8 1 | 345 3459 2359 |
| 279 17 4 | 5 6 3 | 8 179 1279 |
+-----------------+--------+---------------+
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Play this puzzle online at the Daily Sudoku site |
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Asellus
Joined: 05 Jun 2007
Posts: 865
Location: Sonoma County, CA, USA
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| Posted: Thu Aug 09, 2007 9:38 pm Post subject: |
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You can do something in Box 7.
Then, I see a chain. Beyond that I haven't looked. |
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nataraj
Joined: 03 Aug 2007
Posts: 1048
Location: near Vienna, Austria
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| Posted: Fri Aug 10, 2007 10:00 am Post subject: |
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today's "vh" not a great challenge so thx for yours.
after the (1357) quad in box 7 - xwings on '7' and '1' .
xy wing pivot r6c8 (16-15-56).
then xy-chains galore, around but not limited to this spot:
'54'(r6c2)='47'(r2c2)='71'(r9c2) |
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