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moolenaard
Joined: 09 Jan 2009
Posts: 4
Location: California
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 Posted: Thu Jan 29, 2009 8:33 pm Post subject: Another Unlimited Sudoku problem |
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Ok I am must be missing something since I can't seem to solve this
one... Does anyone have an idea how to solve it ?
I can't find any quad pairs or X-wings since that is about as far as
my knowledge goes.....
Dennis
| Code: |
+-----------+----------+-----------------+
| 7 12 128 | 69 4 35 | 2369 23568 1568 |
| 3 5 148 | 7 69 2 | 69 48 148 |
| 6 24 9 | 18 18 35 | 7 2345 45 |
+-----------+----------+-----------------+
| 4 8 5 | 16 7 9 | 136 36 2 |
| 9 7 3 | 2 16 4 | 16 58 58 |
| 2 16 16 | 5 3 8 | 4 9 7 |
+-----------+----------+-----------------+
| 8 246 246 | 3 5 1 | 26 7 9 |
| 5 3 246 | 49 29 7 | 8 1 46 |
| 1 9 7 | 48 28 6 | 5 24 3 |
+-----------+----------+-----------------+
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Play this puzzle online at the Daily Sudoku site |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Thu Jan 29, 2009 8:48 pm Post subject: |
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You have missed a locked pair of fours and an x-wing on 6s.  |
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moolenaard
Joined: 09 Jan 2009
Posts: 4
Location: California
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| Posted: Thu Jan 29, 2009 9:55 pm Post subject: |
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Oh damn..... THANK YOU... I really thought I have covered
everything twice and I left such an obvious X-Wing out there.
My only question to you is about the locked pair of fours
you were talking about the pair (2,4) in r3c2 and r7c2, right ?
I actually did find this one but forgot to change this one at
the dialysudoku site when I created the ASCII verison.
(all though this pair didn't help me)
The X-wing on 16, 16 and 6,9 and 6,9 of course solved
the puzzle.
Thanx
D |
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moolenaard
Joined: 09 Jan 2009
Posts: 4
Location: California
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| Posted: Thu Jan 29, 2009 9:59 pm Post subject: |
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Nevermind. I was of course wrong about the locked pair of fours..
Sorry can't figure out what you mean with that. I just was looking
to hard at fours.....
D |
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wapati
Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
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| Posted: Thu Jan 29, 2009 10:58 pm Post subject: |
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| moolenaard wrote: | Nevermind. I was of course wrong about the locked pair of fours..
Sorry can't figure out what you mean with that. I just was looking
to hard at fours.....
D |
The 246 pair in row 7 and columns 2 and 3 have the only 4s in row 7. One of them must be a 4 so r8c3 cannot be 4. This isn't a critical step but I thought that you would like to know that you missed it.
| Code: | +-------------+----------+-----------------+
| 7 12 128 | 69 4 35 | 2369 23568 1568 |
| 3 5 148 | 7 69 2 | 69 48 148 |
| 6 24 9 | 18 18 35 | 7 2345 45 |
+-------------+----------+-----------------+
| 4 8 5 | 16 7 9 | 136 36 2 |
| 9 7 3 | 2 16 4 | 16 58 58 |
| 2 16 16 | 5 3 8 | 4 9 7 |
+-------------+----------+-----------------+
| 8 #246 #246 | 3 5 1 | 26 7 9 |
| 5 3 26-4| 49 29 7 | 8 1 46 |
| 1 9 7 | 48 28 6 | 5 24 3 |
+-------------+----------+-----------------+ |
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