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dbdotnet
Joined: 14 Feb 2012
Posts: 2
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 Posted: Tue Feb 14, 2012 5:36 am Post subject: How do I proceed in this puzzle? |
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The puzzle is in the Archives section of Daily Sudoku dated 9th Feb 2011. Here is the code after going through the basics:
*-----------------------------------------------------------*
| 7 58 4 | 19 359 15 | 6 28 238 |
| 6 1 3 | 4 8 2 | 5 9 7 |
| 58 9 2 | 7 35 6 | 4 1 38 |
|-------------------+-------------------+-------------------|
| 1 3 9 | 6 7 4 | 28 28 5 |
| 4 7 5 | 3 2 8 | 9 6 1 |
| 2 6 8 | 5 1 9 | 3 7 4 |
|-------------------+-------------------+-------------------|
| 89 4 7 | 1289 59 15 | 28 3 6 |
| 589 258 1 | 289 6 3 | 7 4 28 |
| 3 28 6 | 28 4 7 | 1 5 9 |
*-----------------------------------------------------------*
Thank you. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Tue Feb 14, 2012 5:49 am Post subject: |
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[Withdrawn: grid reposted later.]
Last edited by daj95376 on Tue Feb 14, 2012 3:27 pm; edited 1 time in total |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Tue Feb 14, 2012 7:06 am Post subject: Re: How do I proceed in this puzzle? |
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| dbdotnet wrote: | The puzzle is in the Archives section of Daily Sudoku dated 9th Feb 2011. Here is the code after going through the basics:
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I hope this helps
| Code: | +--------------------------------------------------------------+
| 7 58 4 | 19 359 15 | 6 28 238 |
| 6 1 3 | 4 8 2 | 5 9 7 |
| *58 9 2 | 7 3-5 6 | 4 1 38 |
|--------------------+--------------------+--------------------|
| 1 3 9 | 6 7 4 | 28 28 5 |
| 4 7 5 | 3 2 8 | 9 6 1 |
| 2 6 8 | 5 1 9 | 3 7 4 |
|--------------------+--------------------+--------------------|
| *89 4 7 | 1289 *59 15 | 28 3 6 |
| 589 258 1 | 289 6 3 | 7 4 28 |
| 3 28 6 | 28 4 7 | 1 5 9 |
+--------------------------------------------------------------+
Indicated in the grid above is what is called an xy-wing
if row3col1 is not a 5 it is an 8
if it is an 8 r7c1 has to be a nine
if it is a 9 r7c5 has to be a 5
one or the other r3c1 or r7c5 must be a 5
therefore (=>) r3c5 cannot be a 5 |
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dbdotnet
Joined: 14 Feb 2012
Posts: 2
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| Posted: Tue Feb 14, 2012 2:27 pm Post subject: Re: How do I proceed in this puzzle? |
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| arkietech wrote: | | dbdotnet wrote: | The puzzle is in the Archives section of Daily Sudoku dated 9th Feb 2011. Here is the code after going through the basics:
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I hope this helps
| Code: | +--------------------------------------------------------------+
| 7 58 4 | 19 359 15 | 6 28 238 |
| 6 1 3 | 4 8 2 | 5 9 7 |
| *58 9 2 | 7 3-5 6 | 4 1 38 |
|--------------------+--------------------+--------------------|
| 1 3 9 | 6 7 4 | 28 28 5 |
| 4 7 5 | 3 2 8 | 9 6 1 |
| 2 6 8 | 5 1 9 | 3 7 4 |
|--------------------+--------------------+--------------------|
| *89 4 7 | 1289 *59 15 | 28 3 6 |
| 589 258 1 | 289 6 3 | 7 4 28 |
| 3 28 6 | 28 4 7 | 1 5 9 |
+--------------------------------------------------------------+
Indicated in the grid above is what is called an xy-wing
if row3col1 is not a 5 it is an 8
if it is an 8 r7c1 has to be a nine
if it is a 9 r7c5 has to be a 5
one or the other r3c1 or r7c5 must be a 5
therefore (=>) r3c5 cannot be a 5 |
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Thank you very much! |
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