Medium 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.
Little Killer Sudoku at medium difficulty. Diagonals interact with rows, columns, and boxes — you'll need both sum logic and standard Sudoku technique.
1
6
9
4
6
2
5
6
3
4
2
9
4
8
4
2
3
7
4
2
8
9
5
4
1
2
4
3
1
5
6
3
Diagonal Clues
↘
from (1,1):
56
(9 cells)
↘
from (1,2):
48
(8 cells)
↘
from (1,3):
31
(7 cells)
↘
from (1,4):
28
(6 cells)
↘
from (1,5):
25
(5 cells)
↘
from (1,6):
22
(4 cells)
↘
from (1,7):
10
(3 cells)
↘
from (1,8):
7
(2 cells)
↘
from (2,1):
35
(8 cells)
↘
from (3,1):
35
(7 cells)
↘
from (4,1):
22
(6 cells)
↘
from (5,1):
29
(5 cells)
↘
from (6,1):
18
(4 cells)
↘
from (7,1):
11
(3 cells)
↘
from (8,1):
10
(2 cells)
↙
from (1,2):
5
(2 cells)
↙
from (1,3):
16
(3 cells)
↙
from (1,4):
23
(4 cells)
↙
from (1,5):
23
(5 cells)
↙
from (1,6):
31
(6 cells)
↙
from (1,7):
43
(7 cells)
↙
from (1,8):
27
(8 cells)
↙
from (1,9):
55
(9 cells)
↙
from (2,9):
37
(8 cells)
↙
from (3,9):
29
(7 cells)
↙
from (4,9):
32
(6 cells)
↙
from (5,9):
20
(5 cells)
↙
from (6,9):
28
(4 cells)
↙
from (7,9):
18
(3 cells)
↙
from (8,9):
7
(2 cells)
What is Little Killer Sudoku?
Difficulty
★★★★☆
4/5
Constraint Type
Outside Clues
Typical Givens
0–6 given digits
Avg. Solve (Medium)
28 min
Solving Techniques for Medium 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 |
| Short Diagonal Logic | A 1-cell diagonal directly gives that cell's digit. A 2-cell diagonal with clue C has limited pairs — enumerate them immediately. | Intermediate |
| Row/Column Interaction | A diagonal cell belongs to a row, column, and box — combine Little Killer sum constraints with standard uniqueness rules. | Intermediate |
Master these, then take on Hard Little Killer Sudoku to learn Advanced techniques.
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 →
Frequently Asked Questions — Medium Little Killer Sudoku
More questions? See the full Little Killer Sudoku guide.