The New Sudoku Players' Forum

[Fortesque92]

https://postimg.cc/qty5W4zf

[Leren]

Code: Select all

..1..8.73..56....17....1....9.81....53.....46....65.3....1....481...93..94.5..7..

Code: Select all

*-----------------------------------------*
| 4 26   1   | 29  259  8  | 256 7    3   |
| 3 28   5   | 6   7    4  | 29  289  1   |
| 7 268  9   | 3   25   1  | 4   2568 258 |
|------------+-------------+--------------|
| 6 9    4   | 8   1    3  | 25  25   7   |
| 5 3    8   | 279 29   27 | 1   4    6   |
| 1 7    2   | 4   6    5  | 8   3    9   |
|------------+-------------+--------------|
| 2 5    367 | 1   38   67 | 69  689  4   |
| 8 1   a67  |b27  4    9  | 3   256  25  |
| 9 4    3-6 | 5   38  c26 | 7   1    28  |
*-----------------------------------------*

There is an XY Wing in cells marked abc that solves the puzzle. If you don't know XY wings you can read about them here.

Leren

[Fortesque92]

Ah yes I've heard of them before, I would like to learn how to use them. Thanks!