Notes on this puzzle
This hard kakuro fits 56 cells to fill into a 10×10 frame, tied together by 31 clue squares.
13 of the 36 runs can be filled with only one set of digits:
- 3 in 2 → 1 + 2
- 4 in 2 → 1 + 3
- 16 in 2 → 7 + 9
- 23 in 3 → 6 + 8 + 9
- 10 in 4 → 1 + 2 + 3 + 4
- 11 in 4 → 1 + 2 + 3 + 5
The longest run is 5 cells long and 14 runs have only two cells, which is where the arithmetic is tightest. Clue totals go from 3 up to 30, with an average of 14.8.
Where to beginA good first target is the cell at row 1, column 1 of the field: the two runs crossing there settle it. Longer runs hide fewer certainties; build from the short runs inwards.