need help on techniques

Advanced methods and approaches for solving Sudoku puzzles

need help on techniques

Postby janiv » Wed Jun 15, 2005 12:24 pm

I have the following board:

3** 145 ***
**1 *** ***
4** 7*8 *6*

**4 **9 ***
5*2 *** 6*7
*** 8** 4**

*3* 9*7 **6
*** *** 1**
*** 382 **9

I've reached here, and need your help:

36* 145 9**
**1 693 **4
459 728 361

6*4 2*9 ***
5*2 431 6*7
**3 8*6 4**

*35 917 *46
*** 564 1**
146 382 **9

10x,
janiv.
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Postby angusj » Wed Jun 15, 2005 2:07 pm

There's a Naked Pair in the bottom right 3x3 box.

http://www.angusj.com/sudoku/hints.php#naked_pairs

Then look closely at the 2's in row 2.
Last edited by angusj on Wed Jun 15, 2005 10:39 am, edited 2 times in total.
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Need Help on Techniques

Postby papabear » Wed Jun 15, 2005 2:24 pm

Look down column 7 pencil marks for data to complete R7C7.
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