Masyu by Tom Collyer

Masyu by Tom Collyer

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Theme: Logical

Author/Opus: This is the 35th puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Masyu rules.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 1:10, Master = 1:30, Expert = 3:00

Note: Follow this link for other classic Masyu. If you are new to this puzzle type, here are our easiest Masyu to get started on. More Masyu puzzles can be found in The Art of Puzzles.

Slitherlink by Tom Collyer

Slitherlink by Tom Collyer

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Theme: Dominoes

Author/Opus: This is the 34th puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Slitherlink rules.

Answer String: Enter the length in cells of each of the internal loop segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 1:20, Master = 2:00, Expert = 4:00

Note: Follow this link for other classic Slitherlink. If you are new to this puzzle type, here are our easiest Slitherlink puzzles to get started on. More Slitherlink puzzles can be found in our books The Art of Puzzles and Slitherlink and Variations.

Slitherlink by Tom Collyer

Slitherlink by Tom Collyer

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Theme: Zero Box

Author/Opus: This is the 33rd puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Slitherlink rules.

Answer String: Enter the length in cells of each of the internal loop segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 0:40, Master = 1:15, Expert = 2:30

Note: Follow this link for other classic Slitherlink. If you are new to this puzzle type, here are our easiest Slitherlink puzzles to get started on. More Slitherlink puzzles can be found in our books The Art of Puzzles and Slitherlink and Variations.

Consecutive Pairs Sudoku by Tom Collyer

Consecutive Pairs Sudoku by Tom Collyer

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Theme: Clue Symmetry and Logic

Author/Opus: This is the 32nd puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Sudoku rules. Additionally, if a grey circle is given between two adjacent cells, then the two numbers in those cells must be consecutive. (Note: not all grey circles are given; adjacent cells without a circle may contain either consecutive numbers or nonconsecutive numbers.)

Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 7th row from left to right.

Time Standards (highlight to view): Grandmaster = 8:15, Master = 11:45, Expert = 23:30

Note: Follow this link for other variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.

Consecutive Pairs Sudoku by Tom Collyer

Consecutive Pairs Sudoku by Tom Collyer

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Theme: Nine Digits

Author/Opus: This is the 31st puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Sudoku rules. Additionally, if a grey circle is given between two adjacent cells, then the two numbers in those cells must be consecutive. (Note: not all grey circles are given; adjacent cells without a circle may contain either consecutive numbers or nonconsecutive numbers.)

Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 9th row from left to right.

Time Standards (highlight to view): Grandmaster = 6:00, Master = 8:00, Expert = 16:00

Note: Follow this link for other variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.

Consecutive Pairs Sudoku by Tom Collyer

Consecutive Pairs Sudoku by Tom Collyer

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Theme: Clue Symmetry and Logic

Author/Opus: This is the 30th puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Sudoku rules. Additionally, if a grey circle is given between two adjacent cells, then the two numbers in those cells must be consecutive. (Note: not all grey circles are given; adjacent cells without a circle may contain either consecutive numbers or nonconsecutive numbers.)

Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 6th row from left to right.

Time Standards (highlight to view): Grandmaster = 1:00, Master = 1:30, Expert = 3:00

Note: Follow this link for other variations of Sudoku and this link for classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on.

Skyscrapers by Tom Collyer

Skyscrapers by Tom Collyer

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Theme: Middle Numbers (Originally for the 2015 Polish Puzzle Championship Online Qualifier)

Author/Opus: This is the 29th puzzle from our contributing puzzlemaster Tom Collyer.

Rules: Standard Skyscrapers rules.

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 6th row from left to right.

Time Standards (highlight to view): Grandmaster = 9:00, Master = 18:00, Expert = 36:00

Note: Follow this link for other classic Skyscrapers. If you are new to this puzzle type, here are our easiest Skyscrapers to get started on.