## Help me, a very tough one.

Everything about Sudoku that doesn't fit in one of the other sections

### Help me, a very tough one.

Hi!

I am sitting here for hours an i can't solve this sudoku. Perhaps someone can help me.

Code: Select all
`142|736|958|5..|..2|7..|...|..5|12.|---+---+---+..3|...|.1.|9.7|..3|4.2|.61|...|37.|---+---+---+..4|6..|2..|6.9|2..|...|825|341|697|---+---+---+ `

I need one number, then the sudoku is solved, but i do not want to guess it. Is there a chance to find the solution without guessing?

Nice wishes from Austria
Martin
Zmaier

Posts: 2
Joined: 10 December 2005

Zmaier can you post the original puzzle and also the candidate list you have for the stage you've reached
MCC

Posts: 1275
Joined: 08 June 2005

Zmaier,

To start, there are 2 cells in Row 4 that have the candidates {5,8} so 5 and 8 can be eliminated from the rest of the row.
Also look at where 4 is in Block 2 (Column4) so where can 4 go in Block 5, then you will find a naked single at R4C4.
Crazy Girl

Posts: 189
Joined: 08 November 2005

@MMC : Here is the original Sudoku

Code: Select all
`142|73.|..8|...|..2|7..|...|..5|1..|---+---+---+..3|...|.1.|9.7|...|4.2|.6.|...|3..|---+---+---+..4|6..|...|..9|2..|...|8..|.41|697|---+---+---+ `

@Crazy Girl :
Thanks, thats it. I have eliminated a lot of candidates with this method, but i overlooked it.

Bye
Martin
Zmaier

Posts: 2
Joined: 10 December 2005