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 July 2nd, 2010

Suduro for July 2, 2010: Hard

Friday, July 2nd, 2010

Click for printable version Puzzle 673

7

10

14

14

25

19

4

17

13

7

4

14

16

12

24

15

17

14

12

8

11

21

12

25

14

14

6

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

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

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· Still stumped? Here’s the Complete answer.

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To see a special hidden hint/comment about this puzzle, highlight starting here: There is some tricky logic in the gray squares, here. Usually, adding gray squares makes the first phase less solvable, but the second phase more solvable, but in this case, the gray square in the middle of the leftmost column makes both phases more solvable.

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

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

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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.

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By Dan Tow, Copyright 2010, All Rights Reserved