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daj95376
Joined: 23 Aug 2008 Posts: 3854
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Posted: Mon Dec 01, 2008 4:02 am Post subject: Set D Puzzle 65 |
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Swordfish Alert.
Code: | +-----------------------+
| 7 . . | . 5 6 | . . 2 |
| . . 2 | 1 . 4 | . . . |
| . 6 . | 7 . . | 3 . 8 |
|-------+-------+-------|
| . 4 6 | 9 . . | . 1 . |
| 3 . . | . . 5 | . . . |
| 2 1 . | . 6 3 | 8 . . |
|-------+-------+-------|
| . . 7 | . . 1 | . . . |
| . . . | 6 . . | . 3 . |
| 1 . 3 | . . . | . . 6 |
+-----------------------+
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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: Mon Dec 01, 2008 5:06 am Post subject: |
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I started with an xy-wing(458) then to here
Code: | *-----------------------------------------------------------*
| 7 89 48 | 3 5 6 | 1 49 2 |
| 59 3 2 | 1 8 4 | 79 6 579 |
| 45 6 1 | 7 29 29 | 3 45 8 |
|-------------------+-------------------+-------------------|
| 8 4 6 | 9 27 27 | 5 1 3 |
| 3 7 9 | 8 1 5 | 6 2 4 |
| 2 1 5 | 4 6 3 | 8 79 79 |
|-------------------+-------------------+-------------------|
| 6 289 7 | 25 3 1 | 4 589 59 |
| 49 5 48 | 6 79 789 | 2 3 1 |
| 1 289 3 | 25 4 89 | 79 5789 6 |
*-----------------------------------------------------------*
r9c8=7=r9c7=9=r2c7=7=r2c9=5=r7c9-5-r9c8=>r9c8<>5 |
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storm_norm
Joined: 18 Oct 2007 Posts: 1741
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Posted: Thu Dec 04, 2008 10:41 pm Post subject: |
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arkietech wrote: | I started with an xy-wing(458) then to here
Code: | *-----------------------------------------------------------*
| 7 89 48 | 3 5 6 | 1 49 2 |
| 59 3 2 | 1 8 4 | 79 6 579 |
| 45 6 1 | 7 29 29 | 3 45 8 |
|-------------------+-------------------+-------------------|
| 8 4 6 | 9 27 27 | 5 1 3 |
| 3 7 9 | 8 1 5 | 6 2 4 |
| 2 1 5 | 4 6 3 | 8 79 79 |
|-------------------+-------------------+-------------------|
| 6 289 7 | 25 3 1 | 4 589 59 |
| 49 5 48 | 6 79 789 | 2 3 1 |
| 1 289 3 | 25 4 89 | 79 5789 6 |
*-----------------------------------------------------------*
r9c8=7=r9c7=9=r2c7=7=r2c9=5=r7c9-5-r9c8=>r9c8<>5 |
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from your posted grid, if I remove 5 from r9c8, it doesn't break down into singles.
using your grid
Code: | *-----------------------------------------------------------*
| 7 89 48 | 3 5 6 | 1 49 2 |
|*59 3 2 | 1 8 4 |*79 6 -579 |
| 45 6 1 | 7 29 29 | 3 45 8 |
|-------------------+-------------------+-------------------|
| 8 4 6 | 9 27 27 | 5 1 3 |
| 3 7 9 | 8 1 5 | 6 2 4 |
| 2 1 5 | 4 6 3 | 8 79 79 |
|-------------------+-------------------+-------------------|
| 6 289 7 | 25 3 1 | 4 589 *59 |
| 49 5 48 | 6 79 789 | 2 3 1 |
| 1 289 3 | 25 4 89 |*79 5789 6 |
*-----------------------------------------------------------*
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the above marked w-wing on {5,9} removes 5 from r2c9 does break it down to singles. |
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