I'm stuck on the first puzzle of Frank Longo's "Absolutely Nasty Sudoku lvl 3"
- Code: Select all
3 . . | . 1 6 | . . .
. 1 . | 7 . . | 9 2 8
. . . | . 8 . | . 1 6
------+-------+------
. . 7 | . . 4 | . . 1
. . . | . 5 . | . . .
4 . . | 6 . . | 5 . .
------+-------+------
7 2 . | . 6 . | . . .
9 8 5 | . . 2 | . 6 .
. . . | 5 9 . | . . 3
With all the basic techniques I've managed to get the following:
- Code: Select all
3 9 8 | 2 1 6 | . . .
. 1 . | 7 . . | 9 2 8
. 7 . | . 8 . | 3 1 6
------+-------+------
. 5 7 | . . 4 | 6 . 1
. 6 . | . 5 . | . . .
4 3 . | 6 . . | 5 . .
------+-------+------
7 2 3 | . 6 . | . . .
9 8 5 | . . 2 | . 6 .
. 4 . | 5 9 . | 2 . 3
The only extra thing I did was to eliminate some pencilmarks on the bottom right chute, leaving it like this:
- Code: Select all
3 9 8 | 2 1 6 | 47 457 457
56 1 46 | 7 34 35 | 9 2 8
25 7 24 | 49 8 59 | 3 1 6
------------------+--------------------+-------------------
28 5 7 | 389 23 4 | 6 389 1
128 6 129 | 1389 5 13789 | 478 34789 2479
4 3 129 | 6 27 1789 | 5 789 279
------------------+--------------------+-------------------
7 2 3 | 148 6 18 | 148 59 59
9 8 5 | 134 347 2 | 147 6 47
16 4 16 | 5 9 78 | 2 78 3
If someone could give me a hint on what technique I need to use to continue I would be appreciated.
The most advanced technique I have used is XY-wing, which I used to solve puzzle number 2 of the same book, so I must be missing something with this one..
Thanks in advance!
