## Next step needed

Advanced methods and approaches for solving Sudoku puzzles

### Next step needed

okay, i'm stuck on this puzzle, cause every space has two or more possiblities. here is what i have so far

34- --- 58-
91- 854 73-
8-- --- 194
======
7-- 2-- -13
--- -3- --7
-3- --7 --5
======
4-- --- 378
273 489 651
--8 --- 429
buu11235

Posts: 2
Joined: 11 September 2005

Any help would be useful.....
buu11235

Posts: 2
Joined: 11 September 2005

Have a close look at row 6, there is a candidate that can only go in one cell.
SteveF

Posts: 86
Joined: 26 March 2005

I'm new to the terminology, so let's say the 9x9 boxes are represented like so:
ABC
DEF
GHI

One 8 is missing from each of the three middle boxes D,E,F.
In column 2 (Box D), an 8 must be in row 4 or 5.
In column 6 (Box E), an 8 must be in row 4 or 5.
In column 7 (Box F), an 8 must be in row 6 (by elimination of 4 and 5).
PhatFingers

Posts: 10
Joined: 12 September 2005

See how the two blanks in box C are vertically aligned?
Without knowing what order they're in, you know one is a 2 and the other is a 6 (the two remaining digits for that box).

If you assumed they were filled in and took up the only available 2 and 6 for their column, you might uncover a 2 or a 6 in one of the other two columns in box F.
PhatFingers

Posts: 10
Joined: 12 September 2005

It could be helpful to read the General/ Program section of this forum - there's a sticky called 'Basic Terms' which explains how we can all sing from the same song sheet - though of course some of us will always have better voices than others!
emm

Posts: 987
Joined: 02 July 2005