Hi Sebinator0815. It appears that you've made some mistakes along the way. You have six false numbers on your grid. The correct pencilmarks after basic techniques:
- Code: Select all
.---------------.--------------.---------------.
| 6 7 4 | 39 138 189 | 5 138 2 |
| 189 189 5 | 2 36 4 | 19 367 37 |
| 129 129 3 | 5 168 7 | 4 1689 189 |
:---------------+--------------+---------------:
| 5 6 189 | 39 2 189 | 7 139 4 |
| 179 3 179 | 6 4 5 | 8 2 19 |
| 189 4 2 | 7 138 189 | 6 5 139 |
:---------------+--------------+---------------:
| 3 19 6 | 4 5 2 | 19 78 78 |
| 278 28 78 | 1 9 6 | 3 4 5 |
| 4 5 19 | 8 7 3 | 2 19 6 |
'---------------'--------------'---------------'
For the rest you need a bit more advanced techniques. Are you familiar with things like Empty Rectangles, X-Wings, XY-Wings, Remote Pairs? If not, this might be a bit tough puzzle for you. We can help, though, but first you need to correct your mistakes.