The New Sudoku Players' Forum

[kickindaspeaker]

Here is a level 5 puzzle I was attempting. This is from a 'Tazuku' book that goes up to level 6.

Code: Select all

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


After much reflexion, I have only filled 4 cells!! r2c2, r4c1, r4c2, r7c3.

Code: Select all

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


If anyone can help I would be grateful. Thanks!

[emalvick]

The puzzle isn't valid. You show 2 7's in c4/b8.

Erik

[kickindaspeaker]

Thanks Erik, sorry about the mistake! I've corrected it.

[ronk]

Determine the only possiblilities for r2c5 and r3c5 and then try to find its impact on column 4.

[kickindaspeaker]

Cool! Thanks! I don't understand how I missed that... definitely helps a lot.

[kissafool]

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