Suduro

Welcome to suduro.com, the home of Suduro, a fun, elegant new variation on Sudoku, with the challenges of Sudoku and Kakuro puzzles combined. If you already know and enjoy Sudoku, these offer a challenging new dimension to your puzzling. Fill in the gray squares with numbers 1-9 so that the gray squares in each column and row add up to the sums clues in the top-edge and left-edge black squares.

Similarly, the upper-left 3-by-3 grid of numbers shows the gray-squares sums for the corresponding

3-by-3 sub-grids. Fill in the white squares to complete a normal Sudoku puzzle, so every row, column, and 3-by-3 sub-grid has each number 1-9 exactly once.



Archive for February 27th, 2009

Suduro for February 27, 2009: Hard

Friday, February 27th, 2009

Click for printable version Puzzle 290

14

16

17

14

4

11

25

20

13

13

25

15

12

9

19

6

13

22

30

12

5

11

4

14

22

24

12

· Are you stumped? Here’s a more detailed Introduction to Suduro with a fuller explanation of the rules and solution strategies.

· Still stumped? Here’s the Stage-1 answer (filling in just the gray squares).

· Still stumped? Here’s the Complete answer.

To see a special hidden hint/comment about this puzzle, highlight starting here: The gray squares cannot be fully solved without solving a hard Sudoku problem to find most of the white squares using most of the gray squares, at which point you can finally complete the gray quares to complete the white squares.

Want more? Here are some archived puzzles: Easy, Moderate, Challenging, Hard, Brutal, Yesterday’s Puzzle

Want to email or blog a link to this specific puzzle? Here is the permalink.

Publishers, book agents, newspaper editors, Dan Tow, the inventor of Suduro, has a book of Suduro puzzles ready for immediate publication. Here’s his email address, and the website for his day job.

By Dan Tow, Copyright 2008, All Rights Reserved