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.

		42	10	24			15	14
	20				16	16 17			17
	40 21
7			20 24				12 14
16					13			17	34
20				14	13 42
22							10 6
	24					12
	32	19 18				21 11
12			20 17				7 30
17				19				35
11				18 17					13
10			36 14
25						6
	9	13 12			16	7 8
6			11 9				6 6
38
	17				10

Free online kakuro puzzles