Rules:

1) No row or column may contain the same digit more than once. Zero is not used.

2)The numbers above and to the left show the totals of each group of adjacent numbers in the relevant column or row.

3) Within a given row or column there must be one or more blank squares separating the groups from each other.

Example: 5 13 12 might lead to
5-4126--93

          6        15    2  10 5  11 16
          8  30    14 14 19 17 10 27 13
          18 9  27 8  6  12 15 20 4  3
         +--+--+--+--+--+--+--+--+--+--+
 3 10 18 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
 12 18 6 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
    20 7 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
 5 3 6 8 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
   25 19 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
13 13 14 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
    6 29 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
 18 7 19 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
    9 23 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+
  7 7 14 |  |  |  |  |  |  |  |  |  |  |
         +--+--+--+--+--+--+--+--+--+--+

+---+---+---+---+---+---+---+---+---+---+
|   | 3 |   | 2 | 8 |   | 7 | 5 | 6 |   |
+---+---+---+---+---+---+---+---+---+---+
| 4 | 8 |   | 7 | 6 | 2 | 3 |   | 5 | 1 |
+---+---+---+---+---+---+---+---+---+---+
| 2 | 9 | 3 | 6 |   |   |   |   |   | 7 |
+---+---+---+---+---+---+---+---+---+---+
|   | 1 | 4 |   |   | 3 |   | 6 |   | 8 |
+---+---+---+---+---+---+---+---+---+---+
| 8 | 2 | 6 | 9 |   | 7 | 5 | 4 | 3 |   |
+---+---+---+---+---+---+---+---+---+---+
|   | 7 | 5 | 1 |   | 9 | 4 |   | 8 | 6 |
+---+---+---+---+---+---+---+---+---+---+
|   |   | 2 | 4 |   |   | 8 | 9 | 7 | 5 |
+---+---+---+---+---+---+---+---+---+---+
| 6 | 5 | 7 |   | 3 | 4 |   | 8 | 9 | 2 |
+---+---+---+---+---+---+---+---+---+---+
| 5 | 4 |   | 3 | 1 | 8 | 9 | 2 |   |   |
+---+---+---+---+---+---+---+---+---+---+
| 7 |   |   | 5 | 2 |   | 6 | 1 | 4 | 3 |
+---+---+---+---+---+---+---+---+---+---+