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 January 18th, 2009

Suduro for January 18, 2009: Brutal

Sunday, January 18th, 2009

Click for printable version Puzzle 55

7

18

14

14

14

20

12

9

26

13

7

13

16

17

8

19

22

19

8

19

12

13

18

17

18

14

15

· 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: This appears to require a guess, in the gray squares, which will *finally* (after much work) lead to a contradiction, if you guess wrong, and then back up and try the other guess.

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