The cage sums must be as the following pattern:
Code:
10 13 15
12 04 08 14
16 02 05 06 09
19 07 01 11
03 17 18
After basic moves:
Code:
+----------------------------+----------------------------+----------------------------+
| 45 2 3 | 1 7 6 | 8 459 459 |
| 148 18 6 | 359 239 235 | 7 1234 1234 |
| 15 9 7 | 4 23 8 | 123 56 12356 |
+----------------------------+----------------------------+----------------------------+
| 168 3 45 | 689 1249 247 | 1249 #89 1245789 |
| 9 18 2 | 38 5 347 | 6 13478 1478 |
| 168 7 45 | 3689 12349 234 | 12349 1258 1234589 |
+----------------------------+----------------------------+----------------------------+
| 2 5 @89 | 7 6 1 | 349 *39 3489 |
| 7 6 @89 | 35 34 345 | 129 -1289 *28 |
| 3 4 1 | 2 8 9 | 5 67 67 |
+----------------------------+----------------------------+----------------------------+
11/2 @ r7c8=[38|92]
=> Either r7c8=9 or r8c9=8
=> r78c3 can't be [98], must be [89]
r4c8+r7c8+r8c9=[838|892|938] must have 8
=> r8c8, seeing all 3 cells, can't be 8
=> HS @ r8: r8c9=8 => r7c8=3
=> 3 @ r5,n5 locked @ r5c46
9/2 @ r5c9=[18|45|72] => r6c8 from {258}
Code:
+-------------------------+-------------------------+-------------------------+
| 45 2 3 | 1 7 6 | 8 459 459 |
| 148 *18 6 | 359 239 235 | 7 124 1234 |
|*15 9 7 | 4 23 8 | 123 *56 12356 |
+-------------------------+-------------------------+-------------------------+
| 168 3 45 | 689 1249 247 | 1249 *89 124579 |
| 9 *18 2 | 38 5 @347 | 6 1478 -147 |
| 168 7 45 | 689 1249 @24 | 12349 -258 123459 |
+-------------------------+-------------------------+-------------------------+
| 2 5 8 | 7 6 1 | 49 3 49 |
| 7 6 9 | 35 34 345 | 12 12 8 |
| 3 4 1 | 2 8 9 | 5 67 67 |
+-------------------------+-------------------------+-------------------------+
r3c1+r25c2+r34c8=[18159|18168|51868|58168]
=> r5c2+r4c8=[19|18|88|18]
=> Either r5c2=1 or r4c8=8 or both
=> 9/2 @ r5c9 can't be [18], must be [45|72]
=> Either r5c9=4 or r6c8=2
=> r56c6 can't be [42]
=> r5c6 can't be 4
Code:
+-------------------------+-------------------------+-------------------------+
| 45 2 3 | 1 7 6 | 8 459 459 |
| 148 18 6 | 359 239 235 | 7 124 1234 |
| 15 9 7 | 4 23 8 | 123 56 12356 |
+-------------------------+-------------------------+-------------------------+
| 168 3 45 | 689 1249 247 | 1249 89 124579 |
| 9 18 2 | 38 5 37 | 6 1478 47 |
| 168 7 45 | 689 1249 24 | 12349 25 123459 |
+-------------------------+-------------------------+-------------------------+
| 2 5 8 | 7 6 1 | 49 3 49 |
| 7 6 9 | 35 34 345 | 12 12 8 |
| 3 4 1 | 2 8 9 | 5 67 67 |
+-------------------------+-------------------------+-------------------------+
4 @ r5,n6 locked @ r5c89
HS @ c7: r7c7=4 => r7c9=9
HS @ r1: r1c8=9
=> 14/2 @ r3c8=[68]
HS @ c8: r6c8=5
=> 9/2 @ r5c9=[45]
All naked singles from here.
If you still need extra help then try googling the first 2 words of the title. 
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