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roaa
Joined: 18 Apr 2009
Posts: 112
Location: Sweden
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 Posted: Thu Jul 08, 2010 12:15 pm Post subject: July 8 puzzle |
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| For me todays puzzle (July 8) labelled as hard was more difficult than many of the VH:s with simple xy-wings. Has anybody another opinion? |
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Kdelle
Joined: 20 Mar 2008
Posts: 59
Location: Hudson, NH
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| Posted: Thu Jul 08, 2010 3:26 pm Post subject: Re: July 8 puzzle |
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| roaa wrote: | | For me todays puzzle (July 8) labelled as hard was more difficult than many of the VH:s with simple xy-wings. Has anybody another opinion? |
It was more difficult for me too but it probably should not have been. Took me a long time to spot a naked triple that I should have seen earlier. One of those "Duh!!" moments. |
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Mindwarp
Joined: 13 Sep 2007
Posts: 25
Location: St. Ives, England
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| Posted: Fri Jul 09, 2010 3:14 am Post subject: |
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| Nope, tried it several times couldn't solve it so it now goes into my unsolved sudoku file. Been quite a few puzzles recently that I haven't been able to solve, I suspect they may all have the same technique to solve them, one which I don't know. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Fri Jul 09, 2010 1:00 pm Post subject: |
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Look for a 15 pair in C6. Then for a 135 triple in R9. You should then be set.
Keith |
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Ema Nymton
Joined: 17 Apr 2009
Posts: 89
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| Posted: Sat Jul 10, 2010 2:50 pm Post subject: |
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| Mindwarp wrote: | | Nope, tried it several times couldn't solve it so it now goes into my unsolved sudoku file. Been quite a few puzzles recently that I haven't been able to solve, I suspect they may all have the same technique to solve them, one which I don't know. |
After basic steps gets one here:
| Code: |
+--------------+-------------+-----------------+
| 2346 39 69 | 256 1 8 | 7 2345 34 |
| 23678 1 5 | 4 67 27 | 38 23 9 |
| 2478 28 78 | 257 9 3 | 158 6 148 |
+--------------+-------------+-----------------+
| 78 6 2 | 37 4 79 | 1389 139 5 |
| 9 5 3 | 1 8 6 | 4 7 2 |
| 1 4 78 | 237 5 279 | 6 39 38 |
+--------------+-------------+-----------------+
| 36 7 16 | 8 2 15 | 1359 13459 1346 |
| 5 39 169 | 67 367 4 | 2 8 1367 |
| 28 28 4 | 9 C36715* | A135 B135 1367 |
+--------------+-------------+-----------------+
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The row 9 pair 15 makes the C not a 3. (If c5r9 is 3, then *,A,&B become 15). The rest of the puzzle falls into place.
Ema Nymton
~@:O?
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Mogulmeister
Joined: 03 May 2007
Posts: 1151
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| Posted: Sat Jul 10, 2010 4:33 pm Post subject: |
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| Surely the column 6 pair of 15s Notmyname ? |
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