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Theme: Logical (originally in Ashish’s book “Enthralling Sudoku“)

Author/Opus: This is the 40th 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 5th row from left to right, followed by a comma, followed by the 9th row from left to right.

Time Standards (highlight to view): Grandmaster = 7:00, Master = 9:30, Expert = 19:00

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

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Theme: In Memory of Florian Kirch (FK)

Author/Opus: This is the 278th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Standard Tight Fit Sudoku rules. Also, digits within a grey square must be even and digits within a grey circle must be odd. The range of this puzzle is 1-9.

Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 6th row from left to right. (Note: for the tight fit cells, enter the top before the bottom as would be normal for the read order.)

Time Standards (highlight to view): Grandmaster = 2:45, Master = 5:45, Expert = 11:30

Note: Follow this link for other Tight Fit Sudoku puzzles on this website. If you are new to this puzzle type, here are our easiest Tight Fit 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: 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: Nothing in the Middle

Author/Opus: This is the 1st puzzle from guest contributor Akash Doulani.

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 = 3:00, Master = 4:45, Expert = 9:30

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

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Theme: Target

Author/Opus: This is the 1st puzzle from guest contributor Gaurav Kumar Jain. You can find more puzzles from Gaurav on the blog Life in Sudoku.

Rules: Standard Sudoku rules. Also, digits in circles must be odd and digits in squares must be even.

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 = 2:15, Master = 3:15, Expert = 6:30

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