Notes on this puzzle
Kakuro #5210 is a 8×8 field with 40 white cells split into 24 runs: 12 across and 12 down.
5 of the 24 runs can be filled with only one set of digits:
- 3 in 2 → 1 + 2
- 16 in 2 → 7 + 9
- 23 in 3 → 6 + 8 + 9
The longest run is 5 cells long and 10 runs have only two cells, which is where the arithmetic is tightest. Clue totals go from 3 up to 33, with an average of 18.
Where to beginA good first target is the cell at row 1, column 3 of the field: the two runs crossing there settle it. Use the crossings: a cell's digit must be allowed by both its runs.