Properties of Survo Puzzles
The rules of Survo puzzles are simpler than those of Sudoku. The grid is always rectangular or square and typically much smaller than in Sudoku and Kakuro.
The solving strategies are varying depending on the difficulty of the puzzle. In their simplest form, as in the following 2 × 3 case (degree of difficulty 0)
| 3 | 9 | ||
| 6 | 12 | ||
| 9 | 7 | 5 |
Survo puzzles are suitable exercises in addition and subtraction.
The open 3 × 4 Survo puzzle (degree of difficulty 150)
| 24 | ||||
| 15 | ||||
| 39 | ||||
| 21 | 10 | 18 | 29 |
where none of the numbers are readily given, is much harder. Also it has only one solution.
The problem can be simplified by giving some of the numbers readily, for example, as
| 7 | 5 | 24 | ||
| 1 | 8 | 15 | ||
| 11 | 39 | |||
| 21 | 10 | 18 | 29 |
which makes the task almost trivial (degree of difficulty 0).
Read more about this topic: Survo Puzzle
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