Sunday, March 12, 2006

Introducing Kakuro, a numbers puzzle that will run weekly in the Sunday Source. Kakuro resembles a crossword, but like the popular Sudoku, it uses numbers instead of words. Unlike Sudoku, Kakuro involves addition.

The aim of the game is to fill in the blank squares using the numerals 1 through 9. A circled number, aka a "clue," tells the sum of the numbers that should go in the adjacent open squares. A number in the top right corner is an "across" clue (see the green box above); and one in the bottom left, a "down" clue (see the red box above). (We filled in the answers to two clues to get you started.)

No number appears twice in any solution to a clue. For example, if the clue is 6 and you have two open squares, you could have 1 and 5, or 2 and 4, but not 3 and 3.

To check your work (or if you need to sneak a peek), the solutions to this puzzle and the one on the cover are on page M7.

The two puzzles this week are "easy." We'll be offering more "easy" puzzles as well as harder ones in the weeks to come.

Let us know what you think. Write to Comics Editor, 1150 15th St. NW, Washington, D.C. 20071, e-mail us at http://comics@www.washpost.com/ , or call 202-334-4775. And for daily Kakuro puzzles and playing tips, visit http://www.kakuro.com/ .

© 2006 The Washington Post Company