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Clement
Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania
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 Posted: Tue Apr 19, 2011 12:30 am Post subject: April 19 VH |
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| XY-Wing 69 67 79 pivot in r7c7 setting r8c1<>9 solves it. |
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mackem
Joined: 09 Apr 2011
Posts: 5
Location: Thailand
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| Posted: Tue Apr 19, 2011 5:45 am Post subject: |
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Thanx again. Hopefully I'll get the hang of it one day.  |
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George Woods
Joined: 28 Mar 2006
Posts: 304
Location: Dorset UK
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| Posted: Tue Apr 19, 2011 12:33 pm Post subject: another couple of solutions |
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the W-wing 46 in boxes 1 and 9 acting on 6 in col7 deny a 4 to r9c3.
Exactly the same result can be achieved via an ER? The 4s in Box 1 and the strong linked 4s in col 9 forbid a 4 at r9c3 (else there is no room for a 4 in box 1 |
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roaa
Joined: 18 Apr 2009
Posts: 112
Location: Sweden
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| Posted: Tue Apr 19, 2011 1:27 pm Post subject: |
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| I used the xy-wing 467, also with pivot at r7c7. |
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cgordon
Joined: 04 May 2007
Posts: 769
Location: ontario, canada
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| Posted: Tue Apr 19, 2011 2:31 pm Post subject: |
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| I also used an ER using the 4s in Box 3 and the two 4s in C3 to eliminate the 4 in R9C9. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Tue Apr 19, 2011 3:51 pm Post subject: |
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| I'll throw in a Skyscraper on 4 in columns 39. |
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