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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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 Posted: Wed Feb 08, 2012 10:55 pm Post subject: Feb 9 VH |
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| X-Wing on 4 in r36; r2c4<>4 and r78c9<>4 opens a kite on 7 originating from BOX 2; r4c8<>7 solves it. |
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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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| Posted: Wed Feb 08, 2012 11:29 pm Post subject: Feb 9 VH |
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| Well, the skyscraper on 7 in col 67; r4c8<>7 is a one stepper solution. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Feb 09, 2012 5:53 am Post subject: |
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First time in ages that I couldn't find a solution using the standard VH steps.
| Code: |
+-----------+---------------+------------+
| 3 4 6 | 5 27 8 | 1 79 279 |
| 128 18 5 | 149 2479 479 | 47 6 3 |
| 12 7 9 | 14 6 3 | 8 5 24 |
+-----------+---------------+------------+
| 49 3 1 | 6 8 479 | 2 479 5 |
| 49 5 8 | 3 479 2 | 47 1 6 |
| 6 2 7 | 49 1 5 | 3 8 49 |
+-----------+---------------+------------+
| 18 168 3 | 7 49 1469 | 5 2 148 |
| 5 9 2 | 8 3 14 | 6 47 147 |
| 7 168 4 | 2 5 16 | 9 3 18 |
+-----------+---------------+------------+
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Play this puzzle online at the Daily Sudoku site |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Thu Feb 09, 2012 11:47 am Post subject: |
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| Marty R. wrote: | First time in ages that I couldn't find a solution using the standard VH steps.
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| Code: | after the x-wing
*-----------------------------------------------------------*
| 3 4 6 | 5 27 8 | 1 79 29 |
| 128 18 5 | 19 2479 479 | 47 6 3 |
| 12 7 9 | 14 6 3 | 8 5 24 |
|-------------------+-------------------+-------------------|
| 4-9 3 1 | 6 8 479 | 2 *79 5 |
|*49 5 8 | 3 479 2 |*47 1 6 |
| 6 2 7 | 49 1 5 | 3 8 49 |
|-------------------+-------------------+-------------------|
| 18 6 3 | 7 49 49 | 5 2 18 |
| 5 9 2 | 8 3 1 | 6 4 7 |
| 7 18 4 | 2 5 6 | 9 3 18 |
*-----------------------------------------------------------*
xy-wing
*-----------------------------------------------------------*
| 3 4 6 | 5 27 8 | 1 79 29 |
| 128 18 5 | 19 2479 479 | 47 6 3 |
| 12 7 9 | 14 6 3 | 8 5 24 |
|-------------------+-------------------+-------------------|
| 4 3 1 | 6 8 *79 | 2 79 5 |
| 9 5 8 | 3 *47 2 | 47 1 6 |
| 6 2 7 | 49 1 5 | 3 8 49 |
|-------------------+-------------------+-------------------|
| 18 6 3 | 7 *49 4-9 | 5 2 18 |
| 5 9 2 | 8 3 1 | 6 4 7 |
| 7 18 4 | 2 5 6 | 9 3 18 |
*-----------------------------------------------------------*
xy-wing
*--------------------------------------------------*
| 3 4 6 | 5 *27 8 | 1 79 29 |
| 128 18 5 | 19 *247 9-7 |*47 6 3 |
| 12 7 9 | 14 6 3 | 8 5 24 |
|----------------+----------------+----------------|
| 4 3 1 | 6 8 79 | 2 79 5 |
| 9 5 8 | 3 47 2 | 47 1 6 |
| 6 2 7 | 49 1 5 | 3 8 49 |
|----------------+----------------+----------------|
| 18 6 3 | 7 9 4 | 5 2 18 |
| 5 9 2 | 8 3 1 | 6 4 7 |
| 7 18 4 | 2 5 6 | 9 3 18 |
*--------------------------------------------------*
xyz-wing |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Thu Feb 09, 2012 4:17 pm Post subject: |
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| Thanks Dan. After the X-Wing I played two XY-Wings and was looking at a BUG+2. Should have tried again but I thought I'd end up with the same result. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Tue Feb 14, 2012 1:44 pm Post subject: |
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After the X-wing, a DP 18 sets R2C1=2.
Keith |
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