Just a question on a simple BUG

Advanced methods and approaches for solving Sudoku puzzles

Just a question on a simple BUG

Postby Camchase » Wed Jul 09, 2008 12:45 am

When there are more than 2 unsolved squares in a nonet and I have a BUG situation I never know how to solve which digit(s) to eliminate.

R1C5=28
R1C6=38
R2C5=35
R3C5=235

The 235 is the only square in the puzzle with 3 digits in it. All the other unsolved squares have 2 digits.

Any help would be appreciated.

Thanks,

Cam

(I will post the whole puzzle if someone will tell me how to do that.:D )
Camchase
 
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Postby eleven » Wed Jul 09, 2008 2:36 pm

The quick answer is, the trivalue cell only can be a candidate, which appears exactly 2 more times in the same row, column and box. If the grid is reduced correctly, this should only be the case for one of the 3 candidates.
So if you have listed all appearances of 235 in box 2, it only can be the 3.

To post a puzzle or grid, copy and paste it, highlight it with the mouse and press the "Code" button. It will be surrounded then by the "code" tags like

[code]grid line 1
grid line 2
...
[/code]
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eleven
 
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