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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Sun Feb 07, 2010 5:58 pm Post subject: Puzzle 10/02/07 (B) |
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XYZ-Wing alert. Only one needed ... but not a single stepper.
| Code: | +-----------------------+
| . . . | . . 7 | . . . |
| . 3 . | 2 1 5 | . . 4 |
| . . 5 | 3 . . | . 2 . |
|-------+-------+-------|
| . 5 6 | . . 1 | 7 . 2 |
| . 7 . | . 2 . | 8 . . |
| 9 4 . | 5 . . | . . . |
|-------+-------+-------|
| . . . | 7 6 . | 2 . 5 |
| . . 7 | . . . | . 1 . |
| . 6 . | 1 . . | 3 . 8 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Sun Feb 07, 2010 8:31 pm Post subject: |
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With the clue, I only needed two steps.
| Quote: | xyz-wing 459 with hinge in r9c5 deletes 9 in r9c6, and opens up a
finned x-wing 9 in r19c35 deletes 9 from r2c3.
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Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Feb 08, 2010 5:42 am Post subject: |
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| I needed more. I played the XYZ-Wing (459) and XY-Wing (492). I then looked at the potential DP (89) in boxes 12 and determined that breaking it up with one of the 4s in c5 was invalid and that finished it off. |
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