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.

	15	17	5		16	25		40	13
6				12 8			9
29							3 14
3			28
14			16	27 10
		15 24				4			13
	24 23				33	18 12
14			20	7			9 11
19				18 18				10	24
45
	9	22 30				19
13			7 26			8	12 17
13					13 22
	10			24 26				13	26
	16 8					13	9
36							3 9
9			31
12			9			12

Free online kakuro puzzles