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.

	14	16	16		12	34		16	15
21				9 6			4
23							12 12
		31 31
	12 10				19
16				6	12 28			19	8
7			11			20 19
8			13 21				10 18
	9			25 19
	6	23 19						35
20						17 6			23
10			12 19				17
12				12 16			15 30
		3 11				22 16
	7 24				8 19
40								12	7
10			34
13			3			23

Free online kakuro puzzles