Sudoku Players' Forum (clone)

+------+-------+-------+
| 3 x x | x 6 x| 1 x x |
| 7 8 x | x x 4| 5 9 6 |
| x x x | 5 x x| 3 2 x |
+------+-------+-------+
| x 9 x | x x x | x x x |
| 6 x x | 8 x 9 | x x 1 |
| x x x | x x x | 9 5 x |
+------+-------+-------+
| x 1 7 | x x 5 | x x x |
| x x x | 6 x x | x 3 5 |
| x x 3 | x 2 x | x 1 9 |
+------+-------+-------+
tough puzzle, has me totally flustered. I am not one to guess. One number please

In Box 7 (bottom left hand corner), can you see where to put a 6. (or rather where it can't go). The technique is called a hidden single.

This solves with very basic techniques hidden and naked singles throughout.