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or solve online (using our beta test of Penpa-Edit tools)

Theme: Diamond

Author/Opus: This is the 2nd puzzle from guest contributor R. Kumaresan.

Rules: Standard Sudoku rules.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 3:45, Master = 5:45, Expert = 11:30

Solution: PDF; a solution video is also available here.

Note: Follow this link for other classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on. More classic Sudoku puzzles can be found in The Art of Sudoku, The Art of Sudoku 2 and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.

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or solve online (using our beta test of Penpa-Edit tools)

Theme: Even Odd Squares

Author/Opus: This is the 381st puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Sudoku rules.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 1:40, Master = 2:45, Expert = 5:30

Solution: PDF; a solution video is also available here.

Note: Follow this link for other classic Sudoku. If you are new to this puzzle type, here are our easiest Sudoku to get started on. More classic Sudoku puzzles can be found in The Art of Sudoku, The Art of Sudoku 2 and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.

PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between Sudoku = big entries and Number candidate = small entries in the corners of cells.)

Theme: Singles

Author/Opus: This is the 343rd puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Tight Fit Sudoku rules. Remember, the smaller number goes above the larger number in all slashed cells. The range of this puzzle is 1-9.

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:50, Master = 1:30, Expert = 3:00

Solution: PDF; a solution video is also available here.

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. More Tight Fit Sudoku can be found in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, in The Art of Sudoku 2, and in Masterpiece Sudoku Mix 5: Tight Fit Sudoku.

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or solve online (using our beta test of Penpa-Edit tools)

Theme: 0123

Author/Opus: This is the 198th puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Standard Nurikabe rules.

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 3:30, Master = 9:00, Expert = 18:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Nurikabe and this link for Nurikabe variations. If you are new to this puzzle type, here are our easiest Nurikabe puzzles to get started on. More Nurikabe puzzles can be in The Art of Puzzles, in our beginner-friendly book Logic Puzzles 101, and in the e-book Nurikabe by Ashish Kumar.

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or solve online (using our beta test of Penpa-Edit tools)

Theme: Diamond Archipelago

Author/Opus: This is the 380th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Variation of Nurikabe rules. Every region of white cells must contain exactly two numbers (instead of one) and have total size equal to the sum of the two numbers.

Also, see this example:

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 4:00, Master = 6:15, Expert = 12:30

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Nurikabe and this link for Nurikabe variations. If you are new to this puzzle type, here are our easiest Nurikabe puzzles to get started on. More Nurikabe puzzles can be in The Art of Puzzles, in our beginner-friendly book Logic Puzzles 101, and in the e-book Nurikabe by Ashish Kumar.

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or solve online (using our beta test of Penpa-Edit tools)

Theme: Windmill

Author/Opus: This is the 68th puzzle from our contributing puzzlemaster Ashish Kumar.

Rules: Standard Nurikabe rules. Also, the numbers outside the grid show the number of shaded segments visible in that direction (as in Skyscrapers). A shaded segment of length N in a given direction is taken as a building of height N. A building blocks the view of any building behind it of equal or lesser height.

Also, see this example:

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 2:30, Master = 4:30, Expert = 9:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Nurikabe and this link for Nurikabe variations. If you are new to this puzzle type, here are our easiest Nurikabe puzzles to get started on. More Nurikabe puzzles can be in The Art of Puzzles, in our beginner-friendly book Logic Puzzles 101, and in the e-book Nurikabe by Ashish Kumar.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Diamond

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

Rules: Standard Nurikabe rules.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 1:30, Master = 2:30, Expert = 5:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Nurikabe and this link for Nurikabe variations. If you are new to this puzzle type, here are our easiest Nurikabe puzzles to get started on. More Nurikabe puzzles can be in The Art of Puzzles, in our beginner-friendly book Logic Puzzles 101, and in the e-book Nurikabe by Ashish Kumar.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: T’s for Three and Two

Author/Opus: This is the 206th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Nurikabe rules.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 1:15, Master = 2:30, Expert = 5:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Nurikabe and this link for Nurikabe variations. If you are new to this puzzle type, here are our easiest Nurikabe puzzles to get started on. More Nurikabe puzzles can be in The Art of Puzzles, in our beginner-friendly book Logic Puzzles 101, and in the e-book Nurikabe by Ashish Kumar.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: East vs. West

Author/Opus: This is the 1st puzzle from guest contributor David Altizio.

Rules: Standard Nurikabe rules.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 1:20, Master = 2:15, Expert = 4:30

Solution: PDF; a solution video is also available here.

Note: Follow this link for classic Nurikabe and this link for Nurikabe variations. If you are new to this puzzle type, here are our easiest Nurikabe puzzles to get started on. More Nurikabe puzzles can be in The Art of Puzzles, in our beginner-friendly book Logic Puzzles 101, and in the e-book Nurikabe by Ashish Kumar.

PDF

or solve online (using our beta test of Penpa-Edit tools; in default edgex mode: left-click+drag draws line, right click marks X on edge, tab shifts to a circle shape drawing mode that can help mark the vertices with different circle choices with another tab going back to default edgex)

Theme: Circular Logic

Author/Opus: This is the 197th puzzle from our contributing puzzlemaster Murat Can Tonta.

Rules: Draw a single, non-intersecting loop that only consists of horizontal and vertical segments between the dots. Numbers inside a cell indicate the number of turns taken by the loop at the four dots around it.

Also, see this example:

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 5:00, Master = 10:00, Expert = 20:00

Solution: PDF; a solution video is also available here.

Note: Follow this link for other Loop/Path puzzles. The puzzle styles featured this week are part of the book Loop Variety Collection by Ashish Kumar and Murat Can Tonta.