## Challenger Sudoku help

Post the puzzle or solving technique that's causing you trouble and someone will help

### Challenger Sudoku help

This is the last puzzle in the Challenger section in the World Sudoku magazine from Spring 2007, so i guess it is the most complicated.
The original game is:
Code: Select all
`. . 2|. . 3|. . .9 . .|. . 8|. 1 7. . .|2 . .|3 . 4-----------------. . 1|7 . .|. 6 .2 . .|. 4 .|. . 3. 5 .|. . 6|1 . .-----------------5 . 3|. . 9|. . .7 8 .|1 . .|. . 2. . .|3 . .|9 . .`

And what I have so far after having found a hidden pair (1,9) and eliminating many pencilmarks is:
Code: Select all
`18   147  2   |45   19   3   |568  589  5699    3    45  |456  56   8   |2    1    7168  17   56  |2    19   57  |3    589  4 --------------------------------------------3    9    1   |7    28   25  |4    6    582    6    8   |59   4    1   |57   579  34    5    7   |89   3    6   |1    2    89--------------------------------------------5    124  3   |68   278  9   |678  478  167    8    9   |1    56   4   |56   3    216   124  46  |3    278  257 |9    4578 15 `

I am hoping the solution is not some pair I haven't seen. I have tried some forcing chains that haven't worked. Could someone please tell me how to finish this? Thanks.
JeJ

Posts: 76
Joined: 06 January 2011

### Re: Challenger Sudoku help

Worse ... check [b2].
daj95376
2014 Supporter

Posts: 2624
Joined: 15 May 2006

### Re: Challenger Sudoku help

daj95376 wrote:Worse ... check [b2].

You lost me. What is wrong with that 3 in [b2]? All the 3's in every section are already there.
JeJ

Posts: 76
Joined: 06 January 2011

### Re: Challenger Sudoku help

JeJ wrote:
daj95376 wrote:Worse ... check [b2].

You lost me. What is wrong with that 3 in [b2]? All the 3's in every section are already there.

Sorry for the brevity. I was asking you to check the contents of box 2. There, you will find a solitary "7".
daj95376
2014 Supporter

Posts: 2624
Joined: 15 May 2006

### Re: Challenger Sudoku help

ARRRGGHHHHH!! I can't believe I didn't see that 7. Sorry for bothering you with such a silly request.
JeJ

Posts: 76
Joined: 06 January 2011

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