dailysudoku.com

[jeffs]

I am unable to make any headway on the puzzle below:

600 900 020
050 007 009
000 200 800
040 030 007
040 030 007
001 000 400
200 010 090
005 006 000
005 006 000
100 800 030
060 005 004

there is a unique 2 in r2c3 and that is all i can find apart from a few doubles and triples which eliminate a few possibilities but don't lead to anything.
Any help will be appreciated.
Thanks

[someone_somewhere]

hi,
I will help you with the next number:

Initial SuDoku Table

6 - - 9 - - - 2 -
- 5 - - - 7 - - 9
- - - 2 - - 8 - -
- 4 - - 3 - - - 7
- - 1 - - - 4 - -
2 - - - 1 - - 9 -
- - 5 - - 6 - - -
1 - - 8 - - - 3 -
- 6 - - - 5 - - 4

2 in r2c3 - Unique Horizontal
5 not in r5c5, it is in r4c4 or r5c4 or r6c4 (Column on 3x3 Block interaction)
1 not in r2c4, it is in r1c6 or r3c6 (Column on 3x3 Block interaction)
3 not in r2c4, it is in r1c6 or r3c6 (Column on 3x3 Block interaction)
1 not in r1c7, it is in r2c7 or r2c8 (Row on 3x3 Block interaction)
1 not in r1c9, it is in r2c7 or r2c8 (Row on 3x3 Block interaction)
1 not in r3c8, it is in r2c7 or r2c8 (Row on 3x3 Block interaction)
1 not in r3c9, it is in r2c7 or r2c8 (Row on 3x3 Block interaction)
1 in r7c9 - Unique Vertical

now you can continue ...

For the techniques:
Column on 3x3 Block interaction, Row on 3x3 Block interaction,
Hidden Pair, etc you can take a look at the page:

http://www.simes.clara.co.uk/programs/sudokutechniques.htm

see u,

[jeffs]

Thanks for your help and also the techniques address.
No problems finishing the puzzle once you gave me the extra number.

Thanks again