Easy Little Killer Sudoku
Clues outside the grid give diagonal sums — digits may repeat along the arrow. Combine diagonal enumeration with classic Sudoku logic. Free online.
New to Little Killer Sudoku? Each clue gives the sum of a diagonal — digits may repeat. Start here.
5
4
6
7
4
8
3
7
5
4
2
7
8
2
1
3
4
2
1
8
7
5
3
4
6
2
6
5
7
4
8
1
6
4
5
7
8
2
Diagonal Clues
↘
from (1,1):
47
(9 cells)
↘
from (1,2):
36
(8 cells)
↘
from (1,3):
33
(7 cells)
↘
from (1,4):
28
(6 cells)
↘
from (1,5):
21
(5 cells)
↘
from (1,6):
22
(4 cells)
↘
from (1,7):
12
(3 cells)
↘
from (1,8):
10
(2 cells)
↘
from (2,1):
55
(8 cells)
↘
from (3,1):
34
(7 cells)
↘
from (4,1):
32
(6 cells)
↘
from (5,1):
18
(5 cells)
↘
from (6,1):
16
(4 cells)
↘
from (7,1):
17
(3 cells)
↘
from (8,1):
15
(2 cells)
↙
from (1,2):
15
(2 cells)
↙
from (1,3):
16
(3 cells)
↙
from (1,4):
18
(4 cells)
↙
from (1,5):
16
(5 cells)
↙
from (1,6):
31
(6 cells)
↙
from (1,7):
40
(7 cells)
↙
from (1,8):
51
(8 cells)
↙
from (1,9):
43
(9 cells)
↙
from (2,9):
37
(8 cells)
↙
from (3,9):
21
(7 cells)
↙
from (4,9):
33
(6 cells)
↙
from (5,9):
29
(5 cells)
↙
from (6,9):
25
(4 cells)
↙
from (7,9):
14
(3 cells)
↙
from (8,9):
4
(2 cells)
What is Little Killer Sudoku?
Difficulty
★★★★☆
4/5
Constraint Type
Outside Clues
Typical Givens
0–6 given digits
Avg. Solve (Easy)
14 min
Solving Techniques for Easy Level
| Technique | Description | Level |
|---|---|---|
| Diagonal Enumeration | For each clue, enumerate all combinations of N digits (allowing repeats, 1–9) that sum to the clue value. | Beginner |
| Repeating Digits Allowed | Unlike Killer cages, Little Killer diagonals can repeat digits as long as standard row/column/box uniqueness is preserved. | Beginner |
Ready to go deeper? Try Medium Little Killer Sudoku to unlock Intermediate techniques.
Techniques to Master at Easy
- Notes in Sudoku — Pencil the possible sum splits beside each short diagonal — and remember repeats are legal along a diagonal, so {2,2,5} style splits belong in your notes here.
- Last Possible Number technique — A one-cell diagonal clue is a given digit in disguise, and two-cell clues of 3, 4, 16, or 17 leave each cell only one or two candidates.
Average Solve Time by Difficulty
Easy
14 min
Medium
28 min
Hard
55 min
Expert
88 min
Want a full walkthrough of rules, strategies, and solving steps?
How to Play Little Killer Sudoku →
Related Variants
Killer Sudoku
The cage version of the same idea: sum clues with a no-repeat rule that makes the arithmetic tighter than on diagonals.
Sandwich Sudoku
Also driven entirely by numbers written outside the grid — sums between the 1 and 9 instead of along diagonals.
Skyscraper Sudoku
Another outside-clue variant, replacing diagonal sums with visibility counts read from the grid's edges.
Frequently Asked Questions — Easy Little Killer Sudoku
More questions? See the full Little Killer Sudoku guide.