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Bill Denholm
Joined: 24 Mar 2006
Posts: 17
Location: Mountain View, California
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 Posted: Tue Aug 22, 2006 12:24 pm Post subject: August 21 puzzle hard |
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Once again, I don't understand the hint. After 22 moves, I got stuck and asked for a hint. It was 7 in C4R2. I had candidates of 2, 3 and 7 in that cell. Do the 2 and 3 some drop out? My other 7 in C4 is in C4R8, but I can't see any way to get rid of it. There must be something that I am missing.
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Steve R
Joined: 24 Oct 2005
Posts: 289
Location: Birmingham, England
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| Posted: Tue Aug 22, 2006 1:04 pm Post subject: |
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I’m not too sure of the position you reached but recall pairs (36) in r23c1 and (16) in r23c6. I think they effectively confined 7 to one cell in the second row.
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David
Joined: 02 Jun 2006
Posts: 58
Location: Bedford, UK
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| Posted: Tue Aug 22, 2006 3:21 pm Post subject: |
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| Yes, Steve is correct. Once you see the 3/6 pair it deletes the 7 from r2c1 leaving r2c4 as the only 7 in r2. |
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