Need help with Sudoku by Pappocom #88, 12/27/07

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Need help with Sudoku by Pappocom #88, 12/27/07

Postby Nancy N » Thu Dec 27, 2007 4:18 pm

My husband and I have both arrived at the same place and cannot proceed without guessing. I'm sure we are missing a technique. Can anyone help? This is what we have

124 968 573
3x9 2xx 864
6x8 3x4 192

x3x 79x x85
x95 4x6 731
xxx 5x3 x29

xxx 83x 2x6
x8x 64x 3x7
x63 1x5 948
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Postby Pat » Thu Dec 27, 2007 4:26 pm

Nancy N wrote:My husband and I have both arrived at the same place and cannot proceed without guessing. I'm sure we are missing a technique. Can anyone help? This is what we have

Code: Select all
 1 2 4 | 9 6 8 | 5 7 3
 3 . 9 | 2 . . | 8 6 4
 6 . 8 | 3 . 4 | 1 9 2
-------+-------+------
 . 3 . | 7 9 . | . 8 5
 . 9 5 | 4 . 6 | 7 3 1
 . . . | 5 . 3 | . 2 9
-------+-------+------
 . . . | 8 3 . | 2 . 6
 . 8 . | 6 4 . | 3 . 7
 . 6 3 | 1 . 5 | 9 4 8




in column 1,
there's a "hidden" duo --
only 2 cells are available for the {5,9}
    this leaves a "hidden single" 4 in box 7
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Postby tarek » Thu Dec 27, 2007 4:29 pm

No idea where you've reached exactly.

All you need however, is in Column 1 & box 7 (a column-box elimination then a double)

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I had two replies, thank you so much, Puzzle solved

Postby Nancy N » Thu Dec 27, 2007 7:31 pm

We should have recognized it but did not and now will be vigilant for hidden doubles
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