Kakuro

Language:

4x4: easy intermediate hard challenging expert
6x6: easy intermediate hard challenging expert
8x8: easy intermediate hard challenging expert
9x11: easy intermediate hard challenging expert
9x17: easy intermediate hard challenging expert

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 Blog
Kakuro Rules
Kakuro Tutorials: Basic Challenging

Kakuro Hint: Not sure what all of the valid combinations are for a number? Click on the number clue, and a tooltip will show you the possibilities.

		31	11	14			4	10	6
	20				4	6 16
	37 20
13				10 24			4 11
16					13	3 19
17			16 20					18	12
	24						12 11
	12	11 16			15 19
19						13 23			6
11			14 4				13 19
	5 6			19 7
15					17 10			38
3			33 13						10
		11 27					9 30
	12 18			11	26 8
8			10 14			16 10
43
23					21

Free online kakuro puzzles