The New Sudoku Players' Forum

[suzy_in_nc]

I have been working Puzzle Time Books(Set of 4 with 100 puzzles in each)
399 have been worked. I cannot figure out how to solve this one. Answers are listed in the book, but I cannot figure out anyway this could be done without guesswork. If you can give me an idea how, I would be greatful. Thanks, Suzy
x 9 x x x x x x 6
x x x x 6 4 x 2 x
x x 7 x x 8 x x 9

x 5 x x x x 6 x 4
x x 1 x 5 x 7 x x
4 x 3 x x x x 1 x

1 x x 2 x x 9 x x
x 7 x 1 3 x x x x
2 x x x x x x 3 x

[TKiel]

You can place a bunch of singles and there is also a naked pair in column 8 that creates a couple more naked pairs, which create a naked triple. These don't directly solve the puzzle but they lead to the solution. Hope it's enough but not to much info.

Tracy

[underquark]

Look along the top three rows and see that (N)ine can only go one place in Box2.
Look along the leftmost three columns and see that (S)even can only go one place in Box4 etc.

Code: Select all

 *-----------*
 |.9.|...|..6|
 |...|64N|.2.|
 |..7|.8.|..9|
 |---+---+---|
 |S5.|...|6.4|
 |..1|.5.|7..|
 |4.3|...|.1.|
 |---+---+---|
 |1..|2..|9..|
 |.7.|13.|...|
 |2..|...|.3.|
 *-----------*

[daj95376]

This puzzle only needs:

1) Naked/Hidden Singles
2) Naked Pairs/Triples/Quad

Good luck on finding the correct order!

[MCC]

Code: Select all

 
 *-----------*
 |.9.|...|..6|
 |...|64N|.2.|
 |..7|.8.|..9|
 |---+---+---|
 |S5.|...|6.4|
 |..1|.5.|7..|
 |4.3|...|.1.|
 |---+---+---|
 |1..|2..|9..|
 |.7.|13.|...|
 |2..|...|.3.|
 *-----------*

Underquark, any reason why you've altered box two?
If not, then this is the correct grid.

Code: Select all

 *-----------*
 |.9.|...|..6|
 |...|.64|.2.|
 |..7|..8|..9|
 |---+---+---|
 |.5.|...|6.4|
 |..1|.5.|7..|
 |4.3|...|.1.|
 |---+---+---|
 |1..|2..|9..|
 |.7.|13.|...|
 |2..|...|.3.|
 *-----------*

MCC

[suzy_in_nc]

This is as far as I have been able to get with this puzzle. If anyone could tell me what the next step is, I might be able to get it. I would greatly appreciate it. Thanks, Suzy_in_nc

_ 9 _ _ _ _ _ _ 6
_ _ _ 9 6 4 _ 2 7
_ _ 7 _ _ 8 _ _ 9

7 5 _ _ _ _ 6 _ 4
_ _ 1 4 5 _ 7 _ 3
4 _ 3 _ _ _ _ 1 _

1 3 _ 2 _ _ 9 7 _
_ 7 _ 1 3 _ _ 6 _
2 _ _ _ _ _ _ 3 1

[TKiel]

Look in column 8 for a naked pair.

Tracy

[Pat]

This is as far as I have been able to get with this puzzle.
If anyone could tell me what the next step is, I might be able to get it.

Code: Select all

 . 9 . | . . . | . . 6
 . . . | 9 6 4 | . 2 7
 . . 7 | . . 8 | . . 9
-------+-------+------
 7 5 . | . . . | 6 . 4
 . . 1 | 4 5 . | 7 . 3
 4 . 3 | . . . | . 1 .
-------+-------+------
 1 3 . | 2 . . | 9 7 .
 . 7 . | 1 3 . | . 6 .
 2 . . | . . . | . 3 1

a "hidden" duo in c6.

also, box-line interaction:
the 2 for box6
must be in r6.

~ Pat