Hi. Can someone tell me how to go further by logic?
*------------------------------------------*
| 24 7 234 | 5 34 1 | 8 6 9 |
| 8 35 9 | 6 34 2 | 345 1 7 |
| 1 6 345-2 | 9 8 7 |*2345 345*245 |
|----------------+----------+--------------|
| 3 159 8 | 7 2 6 | 145 459 45 |
| 2459 259 7 | 3 1 49 | 6 8 245 |
| 2469 129 1246 | 8 5 49 | 1247 479 3 |
|----------------+----------+--------------|
| 569 359 356 | 4 7 8 | 35 2 1 |
| 27 4 123 | 12 6 5 | 9 37 8 |
| 257 8 125 | 12 9 3 | 457 457 6 |
*------------------------------------------*
*---------------------------------------------*
| 24 7 234 | 5 34 1 | 8 6 9 |
| 8 35 9 | 6 34 2 | 345 1 7 |
| 1 6 345 | 9 8 7 | 2345 345 245 |
|--------------+----------+-------------------|
| 3 159 8 | 7 2 6 |*145 *459 *45 |
| 2459 259 7 | 3 1 49 | 6 8 25-4 |
| 2469 129 246 | 8 5 49 | 127-4 79-4 3 |
|--------------+----------+-------------------|
| 569 359 356 | 4 7 8 | 35 2 1 |
| 27 4 123 | 12 6 5 | 9 37 8 |
| 257 8 125 | 12 9 3 | 457 457 6 |
*---------------------------------------------*
*-------------------------------------------*
| 24 7 234 | 5 34 1 | 8 6 9 |
| 8 35 9 | 6 34 2 | 345 1 7 |
| 1 6 345 | 9 8 7 | 2345 345 245 |
|-----------------+----------+--------------|
| 3 159 8 | 7 2 6 | 145 459 45 |
| 459-2 *259 7 | 3 1 49 | 6 8 25 |
| 469-2 *129 46-2 | 8 5 49 | 127 79 3 |
|-----------------+----------+--------------|
| 569 359 356 | 4 7 8 | 35 2 1 |
| 27 4 123 | 12 6 5 | 9 37 8 |
| 257 8 125 | 12 9 3 | 457 457 6 |
*-------------------------------------------*
*------------------------------------------*
| 24 7 234 | 5 34 1 | 8 6 9 |
| 8 35 9 | 6 34 2 | 345 1 7 |
| 1 6 345 | 9 8 7 | 2345 345 245 |
|---------------+-----------+--------------|
| 3 159 8 | 7 2 6 | 145 459 45 |
| 459 259 7 | 3 1 49 | 6 8 25 |
|*469 12-9 *46 | 8 5 *49 | 127 7-9 3 |
|---------------+-----------+--------------|
| 569 359 356 | 4 7 8 | 35 2 1 |
| 27 4 123 | 12 6 5 | 9 37 8 |
| 257 8 125 | 12 9 3 | 457 457 6 |
*------------------------------------------*