· 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: Of two gray-squares solutions, only one has a white-squares solution.

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.

.

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.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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: A tidy bit of reasoning in the white squares rules out the wrong gray-squares solution.

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.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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 the website for his day job.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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 the website for his day job.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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 the website for his day job.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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 the website for his day job.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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: It’s a major exercise to rule out the wrong gray-squares solutions, which have no white-squares solutions!

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.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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 can be solved without a guess, using white and gray squares, together, but not easily!

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.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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 the website for his day job.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink

· 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 the website for his day job.

.

Detailed Introduction and Rules

Stage-1 answer ; Complete answer.

Archived puzzles: Easy, Moderate, Challenging, Hard, Brutal,
Yesterday’s Puzzle, today’s permalink