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. Tue, 28 Jul 2026 07:01:04 +0000 http://wordpress.org/?v=2.3 en Suduro for July 28, 2026: Easy http://www.suduro.com/2026/07/28 http://www.suduro.com/2026/07/28#comments Tue, 28 Jul 2026 07:01:04 +0000 admin http://www.suduro.com/2026/07/28 Click for printable version Puzzle 8529

17

8

10

22

13

13

22

11

3

16

22

23

8

16

8

12

3

11

20

10

5

16

22

10

17

8

11

· 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.

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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/2026/07/28/feed Suduro for July 27, 2026: Easy http://www.suduro.com/2026/07/27 http://www.suduro.com/2026/07/27#comments Mon, 27 Jul 2026 07:01:10 +0000 admin http://www.suduro.com/2026/07/27 Click for printable version Puzzle 8481

20

14

9

16

17

9

13

4

21

24

17

8

11

13

11

23

10

6

8

28

7

13

18

11

13

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.

.

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/2026/07/27/feed Suduro for July 26, 2026: Hard http://www.suduro.com/2026/07/26 http://www.suduro.com/2026/07/26#comments Sun, 26 Jul 2026 07:01:10 +0000 admin http://www.suduro.com/2026/07/26 Click for printable version Puzzle 8513

17

15

15

10

14

11

27

22

9

20

21

13

11

20

20

19

12

4

5

20

22

12

8

15

14

27

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.

.

To see a special hidden hint/comment about this puzzle, highlight starting here: Careful 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

.

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/2026/07/26/feed Suduro for July 25, 2026: Hard http://www.suduro.com/2026/07/25 http://www.suduro.com/2026/07/25#comments Sat, 25 Jul 2026 07:01:10 +0000 admin http://www.suduro.com/2026/07/25 Click for printable version Puzzle 8502

16

15

12

10

25

11

12

7

16

21

10

7

8

24

15

9

16

14

24

10

9

13

28

5

19

11

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.

.

To see a special hidden hint/comment about this puzzle, highlight starting here: 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

.

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/2026/07/25/feed Suduro for July 24, 2026: Challenging http://www.suduro.com/2026/07/24 http://www.suduro.com/2026/07/24#comments Fri, 24 Jul 2026 07:01:51 +0000 admin http://www.suduro.com/2026/07/24 Click for printable version Puzzle 8514

15

4

17

16

10

13

19

10

10

21

23

6

12

6

6

12

16

12

10

10

16

21

12

6

11

13

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.

.

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/2026/07/24/feed Suduro for July 23, 2026: Challenging http://www.suduro.com/2026/07/23 http://www.suduro.com/2026/07/23#comments Thu, 23 Jul 2026 07:01:36 +0000 admin http://www.suduro.com/2026/07/23 Click for printable version Puzzle 8545

17

23

22

8

8

19

19

6

3

23

17

4

12

10

15

14

23

7

19

19

24

9

16

10

13

12

3

· 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/2026/07/23/feed Suduro for July 22, 2026: Moderate http://www.suduro.com/2026/07/22 http://www.suduro.com/2026/07/22#comments Wed, 22 Jul 2026 07:01:48 +0000 admin http://www.suduro.com/2026/07/22 Click for printable version Puzzle 8517

11

10

10

22

6

15

4

19

15

13

16

8

15

13

7

15

11

14

8

8

15

10

14

19

4

15

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/2026/07/22/feed Suduro for July 21, 2026: Moderate http://www.suduro.com/2026/07/21 http://www.suduro.com/2026/07/21#comments Tue, 21 Jul 2026 07:01:21 +0000 admin http://www.suduro.com/2026/07/21 Click for printable version Puzzle 8446

12

11

23

24

5

8

8

25

11

18

12

14

14

7

20

19

7

16

4

23

19

15

3

19

20

15

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.

.

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/2026/07/21/feed Suduro for July 20, 2026: Easy http://www.suduro.com/2026/07/20 http://www.suduro.com/2026/07/20#comments Mon, 20 Jul 2026 07:01:07 +0000 admin http://www.suduro.com/2026/07/20 Click for printable version Puzzle 8458

16

17

6

12

11

17

7

13

10

20

8

7

15

11

15

3

19

11

18

12

9

4

18

18

18

3

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.

.

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/2026/07/20/feed Suduro for July 19, 2026: Brutal http://www.suduro.com/2026/07/19 http://www.suduro.com/2026/07/19#comments Sun, 19 Jul 2026 07:01:50 +0000 admin http://www.suduro.com/2026/07/19 Click for printable version Puzzle 8430

17

8

17

22

8

22

9

8

18

16

22

10

4

13

7

30

14

13

13

16

13

18

15

19

20

11

4

· 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/2026/07/19/feed