Suduro http://www.suduro.com 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. Sat, 17 Oct 2026 07:01:30 +0000 http://wordpress.org/?v=2.3 en Suduro for October 17, 2026: Hard http://www.suduro.com/2026/10/17 http://www.suduro.com/2026/10/17#comments Sat, 17 Oct 2026 07:01:30 +0000 admin http://www.suduro.com/2026/10/17 Click for printable version Puzzle 8579

18

13

12

11

10

17

14

14

19

10

18

15

9

14

14

14

22

12

25

6

12

3

8

27

9

28

10

· 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: Just a little logic in the white squares eliminates the wrong solution in the gray squares.

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 his personal website.

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By Dan Tow, Copyright 2026, All Rights Reserved



]]> http://www.suduro.com/2026/10/17/feed Suduro for October 16, 2026: Challenging http://www.suduro.com/2026/10/16 http://www.suduro.com/2026/10/16#comments Fri, 16 Oct 2026 07:01:28 +0000 admin http://www.suduro.com/2026/10/16 Click for printable version Puzzle 8590

8

10

18

15

6

10

9

24

21

9

16

7

15

8

17

14

13

22

16

5

15

4

16

11

16

19

19

· 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.

.

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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved




]]> http://www.suduro.com/2026/10/16/feed Suduro for October 15, 2026: Challenging http://www.suduro.com/2026/10/15 http://www.suduro.com/2026/10/15#comments Thu, 15 Oct 2026 07:01:19 +0000 admin http://www.suduro.com/2026/10/15 Click for printable version Puzzle 8588

15

9

10

10

22

10

24

16

17

13

15

21

6

17

24

9

20

8

5

7

22

6

19

17

15

21

21

· 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.

.

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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved




]]> http://www.suduro.com/2026/10/15/feed Suduro for October 14, 2026: Moderate http://www.suduro.com/2026/10/14 http://www.suduro.com/2026/10/14#comments Wed, 14 Oct 2026 07:01:09 +0000 admin http://www.suduro.com/2026/10/14 Click for printable version Puzzle 8587

5

10

10

21

15

10

11

12

11

12

18

7

11

13

13

4

10

17

9

13

3

23

10

13

5

9

20

· 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.

.

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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved




]]> http://www.suduro.com/2026/10/14/feed Suduro for October 13, 2026: Easy http://www.suduro.com/2026/10/13 http://www.suduro.com/2026/10/13#comments Tue, 13 Oct 2026 07:01:03 +0000 admin http://www.suduro.com/2026/10/13 Click for printable version Puzzle 8607

23

15

10

17

16

15

24

7

13

24

23

17

11

11

16

9

22

7

14

7

27

19

14

15

13

14

17

· 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.

.

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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved




]]> http://www.suduro.com/2026/10/13/feed Suduro for October 12, 2026: Easy http://www.suduro.com/2026/10/12 http://www.suduro.com/2026/10/12#comments Mon, 12 Oct 2026 07:01:45 +0000 admin http://www.suduro.com/2026/10/12 Click for printable version Puzzle 8559

16

7

19

23

9

14

11

14

11

24

4

22

9

18

3

18

8

18

21

3

18

14

15

17

19

12

5

· 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.

.

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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved




]]> http://www.suduro.com/2026/10/12/feed Suduro for October 11, 2026: Brutal http://www.suduro.com/2026/10/11 http://www.suduro.com/2026/10/11#comments Sun, 11 Oct 2026 07:01:32 +0000 admin http://www.suduro.com/2026/10/11 Click for printable version Puzzle 8550

10

9

16

9

10

11

19

6

11

9

15

14

9

13

3

17

15

6

17

7

11

9

18

3

10

6

20

· 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: Only one solution to the gray squares enables a solution to 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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved



]]> http://www.suduro.com/2026/10/11/feed Suduro for October 10, 2026: Hard http://www.suduro.com/2026/10/10 http://www.suduro.com/2026/10/10#comments Sat, 10 Oct 2026 07:01:20 +0000 admin http://www.suduro.com/2026/10/10 Click for printable version Puzzle 8577

9

14

14

12

8

28

15

12

12

5

15

16

15

10

9

7

17

30

15

8

14

18

9

21

14

16

9

· 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: Logic in the white squares leaves one solution in the gray 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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved



]]> http://www.suduro.com/2026/10/10/feed Suduro for October 9, 2026: Challenging http://www.suduro.com/2026/10/09 http://www.suduro.com/2026/10/09#comments Fri, 09 Oct 2026 07:01:56 +0000 admin http://www.suduro.com/2026/10/09 Click for printable version Puzzle 8586

12

12

30

26

9

6

10

20

17

18

10

20

18

13

10

24

14

15

15

22

17

18

10

13

8

23

16

· 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.

.

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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved




]]> http://www.suduro.com/2026/10/09/feed Suduro for October 8, 2026: Challenging http://www.suduro.com/2026/10/08 http://www.suduro.com/2026/10/08#comments Thu, 08 Oct 2026 07:01:22 +0000 admin http://www.suduro.com/2026/10/08 Click for printable version Puzzle 8574

9

23

21

4

24

15

9

13

18

3

4

15

23

16

21

13

21

20

29

8

16

6

19

18

8

19

13

· 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.

.

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 his personal website.

.

By Dan Tow, Copyright 2026, All Rights Reserved




]]> http://www.suduro.com/2026/10/08/feed