Kakuro
Tutorial -- Basic
Locked Cell: Only one valid number remains -- 11 = 1 + 2 + 3 + 5, and 5 is the only valid value for this cell.
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4
11
29
13
3
4
4
10
10
15
17
24
4
22
7
3
10
16
30
4
18
17
4
9
8
25
8
16
4
23
12
16