## Help required

Advanced methods and approaches for solving Sudoku puzzles

### Help required

I am stuck and would like some suggestions and particularly how you worked it out.
5xx 834 x71
8xx 217 xxx
1x7 596 3xx
xxx 95x 426
2xx 68x xx7
659 472 813
9x5 768 1xx
xxx 149 xx5
41x 325 xxx

Thanks

Nicola

Posts: 4
Joined: 29 June 2005

There is a cell that is easy to fill in row 9.
After that, look for a pair in column 2 and make some candidate eliminations.
Based on the candidates remaining in column 2, you can make some candidate eliminations to column 3.
Now fill in a cell in column 3.

scrose

Posts: 322
Joined: 31 May 2005

### Re: Help required

nicolad wrote:I am stuck and would like some suggestions and particularly how you worked it out.

Hi Nicola.

1. Look at the bottom row - only one possibility.
2. Look for a hidden pair in column 2.
3. Look to eliminate candidates in box 1.

Edit: looks like I was beaten to the punch.
angusj

Posts: 306
Joined: 12 June 2005

Scrose You were right about row 9 must have been blind. But in col 2 how do I make a pair. I have the following possibilities
962
9643
42
873
43
5
32
87632
1

Nicola

Posts: 4
Joined: 29 June 2005

nicolad wrote:But in col 2 how do I make a pair. I have the following possibilities

Without giving the game away - you're looking for what I call a "hidden pair" . Click here for an explanation of hidden pairs.

Edit: Bummer - looks like my server is down momentarily, so that link may not load.
angusj

Posts: 306
Joined: 12 June 2005

angusj

Got the hidden pair in col 2 but still stuck. Also you were right couldnt load the examples from the web but got the written explanation of hidden pairs.

Nicola

Posts: 4
Joined: 29 June 2005

Now that you've found the hidden pair, have you made some candidate eliminations in column 2? If and once you have, look at where the remaining candidate 6's are in column 2. What does this tell you about where the candidate 6's cannot be in column 3?
scrose

Posts: 322
Joined: 31 May 2005

thanks everyone finally got it out