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Logic

 
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Don Odone



Joined: 18 Aug 2006
Posts: 2
PostPosted: Fri Aug 18, 2006 11:05 pm    Post subject: Logic Reply with quote
Puzzle for 5/4/06 gets to a point where the following options are possible:
Col. 3, Row 4 has pencil marks 5678
Col. 2, Row 4 has pencil marks 25678
Col. 2, Row 3 has pencil marks 4567
Col. 3, Row 8 has pencil marks 5678
When I requested a hint I was given (5) in Col. 3, Row 4. What was the logic behind that selection? That 5 could have been selected in any of the other choices.
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TKiel



Joined: 22 Feb 2006
Posts: 292
Location: Kalamazoo, MI
PostPosted: Sat Aug 19, 2006 1:18 pm    Post subject: Reply with quote
There is a naked triple in column 2. Once those exclusions are made from the other cells in that column, r4c3 is the only cell in box 4 that can contain a 5.
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