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Theme: Slanting Lines

Author/Opus: This is the 2nd puzzle from guest contributor Akash Doulani.

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 2nd row from left to right, followed by a comma, followed by the 8th row from left to right.

Time Standards (highlight to view): Grandmaster = 3:15, Master = 5:00, Expert = 10:00

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.

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Theme: Odd Box

Author/Opus: This is the 34th puzzle from our contributing puzzlemaster Ashish Kumar.

Rules: Standard Sudoku rules. Also, cells with a square contain an even digit; cells with a circle contain an odd digit.

Answer String: Enter the 3rd row from left to right, followed by a comma, followed by the 6th row from left to right.

Time Standards (highlight to view): Grandmaster = 4:30, Master = 8:00, Expert = 16:00

Note: Follow this link for other Even/Odd Sudoku. Follow this link for classic Sudoku.

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Theme: Even Box

Author/Opus: This is the 33rd puzzle from our contributing puzzlemaster Ashish Kumar.

Rules: Standard Sudoku rules. Also, cells with a square contain an even digit; cells with a circle contain an odd digit.

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 = 3:00, Master = 3:30, Expert = 7:00

Note: Follow this link for other Even/Odd Sudoku. Follow this link for classic Sudoku.

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Theme: Clueless

Author/Opus: This is the 344th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Arrow Sudoku rules.

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 8th row from left to right.

Time Standards (highlight to view): Grandmaster = 6:00, Master = 9:00, Expert = 18:00

Note: Follow this link for more Arrow Sudoku. If you are new to this puzzle type, here are our easiest Arrow Sudoku to get started on.

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Theme: 23

Author/Opus: This is the 21st puzzle from guest contributor Ashish Kumar.

Rules: Standard Sudoku rules. Also, cells with a square contain an even digit; cells with a circle contain an odd digit.

Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 5th row from left to right.

Time Standards (highlight to view): Grandmaster = 6:45, Master = 8:30, Expert = 17:00

Note: Follow this link for other Even/Odd Sudoku. Follow this link for classic Sudoku.

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Theme: Tic-Tac-Toe

Author/Opus: This is the 7th puzzle from guest contributor Zoltán Horváth.

Rules: Standard Thermo-Sudoku rules.

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

Time Standards (highlight to view): Grandmaster = 4:15, Master = 6:45, Expert = 13:30

Note: Follow this link for more Thermo-Sudoku puzzles. If you are new to this puzzle type, here are our easiest Thermo-Sudoku to get started on.

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Theme: Smiley Face

Author/Opus: This is the 4th puzzle from guest contributor Rajesh Kumar.

Rules: Standard Arrow Sudoku rules.

Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 5th row from left to right.

Time Standards (highlight to view): Grandmaster = 4:00, Master = 6:30, Expert = 13:00

Note: Follow this link for more Arrow Sudoku. If you are new to this puzzle type, here are our easiest Arrow Sudoku to get started on.