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 a number is yet? Fill in its remaining possible values -- the cell will automatically resize to accommodate.

	21	10			27	19		37	6
13			13	11			5 30
12				20 15
43
11			9 8			4			3
	17	21 28				9 22
19				34	13
24					8 12
9			22					27	15
6			24 36				11
		19					9 10
	15	10 37			29
23					21	6 11
9				19				19	29
	8			4 10			13 8
	36 8
32						18
9			4				6

Free online kakuro puzzles