Kakuro is like a crossword puzzle with numbers. Each "word" must add up to the number provided in the clue above it or to the left. Words can only use the numbers 1 through 9, and a given number can only be used once in a word. Every kakuro puzzle has one and only solution, and can be solved through logic alone.

Kakuro Hint: Not sure what a number is yet? Fill in its remaining possible values -- the cell will automatically resize to accommodate.

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Also try sudoku and hitori
 
 
11
 
8
 
 
12
 
5
   
 
30
 
21
5
 
5
 
 
12
14
26
11
 
26
21
 
12
 
 
8
26
 
 
 
3
12
29
 
23
11
 
 
16
 
13
19
 
5
4
 
11
25
6
17
 
5
 
34
 
 
17
7
 
15
10
 
 
20
 
27
 
 
10
15
6
 
15
29
 
17
 
3
 
 
7
 
12
 
00:00
You are playing 9x11 hard puzzle 31039

Start over, and play another kakuro of this size and difficulty.