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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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 Posted: Sat Oct 31, 2009 12:19 pm Post subject: Oct 31 VH |
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Solution after about 15 moves:
| Quote: | | W wing 16 in boxes 7 and 8 removes 1s from row 9 except for c1 so r9c1 =1 |
[/quote] |
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arkietech
Joined: 31 Jul 2008
Posts: 1834
Location: Northwest Arkansas USA
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| Posted: Sat Oct 31, 2009 2:44 pm Post subject: |
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| I finally got down to |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Sat Oct 31, 2009 4:07 pm Post subject: |
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| I did not actually finish the puzzle, but it looked like there was a choice of at least three one-steppers. BUG+1, XY-Wing and W-Wing. |
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LloydB
Joined: 09 Jul 2007
Posts: 21
Location: Skagit Co., WA USA
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| Posted: Sat Oct 31, 2009 4:43 pm Post subject: |
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| The 168 XY wing did it for me. |
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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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| Posted: Sat Oct 31, 2009 7:23 pm Post subject: |
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So, I went hunting. After basics:
| Code: | +-------------+-------------+-------------+
| 9 7 6 | 8 3 1 | 2 4 5 |
| 3 2 8 | 5 6 4 | 7 1 9 |
| 5 1 4 | 2 7 9 | 3 6 8 |
+-------------+-------------+-------------+
| 4 69 19 | 3 2 7 | 5 8 16 |
| 67 5 2 | 14 14 8 | 9 3 67 |
| 17 8 3 | 9 5 6 | 4 2 17 |
+-------------+-------------+-------------+
| 2 3 19 | 16 189 5 | 68 7 4 |
| 8 69 7 | 46 49 2 | 1 5 3 |
| 16 4 5 | 7 18 3 | 68 9 2 |
+-------------+-------------+-------------+ |
Bug +1
XY 1-69
XY 16-8
XY 1-68
XYZ -189
W -16
You can find an XY chain to make an elimination in every cell!
Keith |
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