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Theme: Divided

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

Rules: Standard Star Battle rules. Two stars per row, column, and region.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 2:30, Master = 5:30, Expert = 11:00

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

Note: Follow this link for other classic Star Battles and this link for Star Battle variations. If you are new to this puzzle type, here are our easiest Star Battles to get started on. More Star Battle puzzles can be found in The Art of Puzzles, in the books Star Battle by JinHoo Ahn and Star Battle 2 by JinHoo Ahn and Murat Can Tonta, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.

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Theme: Pairs

Author/Opus: This is the 11th puzzle from guest contributor Swaroop Guggilam.

Rules: Standard Kurotto rules.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 2:00, Master = 5:45, Expert = 11:30

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

Note: Follow this link for classic Kurotto puzzles and this link for variations on Kurotto puzzles. If you are new to this puzzle type, here are our easiest Kurotto to get started on. More Kurotto puzzles can be found in the ebook Kurotto by Prasanna Seshadri.

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or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a composite mode for line/edge drawing and a shading mode.)

Theme: Oh Nine

Author/Opus: This is the 2nd puzzle from guest contributor Jeffrey Bardon.

Rules: Standard Araf rules.

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 3:30, Master = 6:00, Expert = 12:00

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

Note: Follow this link for more Araf puzzles on this website. If you are new to this puzzle type, here are our easiest Araf Puzzles to get started on. More Araf puzzles can be found in the ebook Araf by Serkan Yürekli.

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

Theme: House

Author/Opus: This is the 10th puzzle from guest contributor Swaroop Guggilam.

Rules: Standard Arrow Sudoku rules.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 7:30, Master = 13:00, Expert = 26:00

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

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. More Arrow Sudoku puzzles can be found in The Art of Sudoku 2 and Masterpiece Sudoku Mix 3.

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Theme: Double S

Author/Opus: This is the 1st puzzle from guest contributor R. Kumaresan.

Rules: Standard Sudoku rules.

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 3:00, Master = 6:45, Expert = 13:30

Solution: PDF

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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Theme: Turnstile

Author/Opus: This is the 9th puzzle from guest contributor Rajesh Kumar.

Rules: Standard Sudoku rules.

Difficulty: 2.5 stars

Time Standards (highlight to view): Grandmaster = 2:30, Master = 3:30, Expert = 7:00

Solution: PDF

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 a composite mode for line/edge drawing, a number entry mode, and shading for this variation.)

Theme: 2020

Author/Opus: This is the 3rd puzzle from guest contributor Jonas Gleim.

Rules: Standard Fillomino rules. Also, it must be possible to shade some polyominoes black so that no bordering polyominoes are the same color (in other words, the grid must allow a two-color shading).

See also this example:

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 8:30, Master = 15:00, Expert = 30:00

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

Note: Follow this link for classic Fillomino and this link for Fillomino variations. If you are new to this puzzle type, here are our easiest Fillomino puzzles to get started on. More Fillomino puzzles can be found in The Art of Puzzles, in Fill o’ Fillomino and Fill o’ Fillomino 2 by Grant Fikes, and in our beginner-friendly books Logic Puzzles 101 and Starter Pack 1: Fillomino.

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or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a composite mode for line/edge drawing and a number entry mode.)

Theme: Question Mark

Author/Opus: This is the 3rd puzzle from guest contributor wormsofcan.

Rules: Standard Fillomino rules.

Difficulty: 2 stars

Time Standards (highlight to view): Grandmaster = 1:45, Master = 2:30, Expert = 5:00

Solution: PDF

Note: Follow this link for classic Fillomino and this link for Fillomino variations. If you are new to this puzzle type, here are our easiest Fillomino puzzles to get started on. More Fillomino puzzles can be found in The Art of Puzzles, in Fill o’ Fillomino and Fill o’ Fillomino 2 by Grant Fikes, and in our beginner-friendly books Logic Puzzles 101 and Starter Pack 1: Fillomino.

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

Theme: Thinking Outside the Box

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

Rules: Standard LITS rules.

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 4:45, Master = 6:15, Expert = 12:30

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

Note: Follow this link for classic LITS and this link for LITS variations. If you are new to this puzzle type, here are our easiest LITS to get started on. More LITS puzzles can be found in LOTS O’ LITS by Grant Fikes and Prasanna Seshadri, in The Art of Puzzles 2, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.

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Theme: Double “LITS”

Author/Opus: This is the 22nd puzzle from guest contributor Joseph Howard.

Rules: Standard LITS rules, except that each region must contain two shaded tetrominoes. These two tetrominoes within a region cannot touch each other, and can be the same or different shapes.

Difficulty: 3.5 stars

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

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

Note: Follow this link for classic LITS and this link for LITS variations. If you are new to this puzzle type, here are our easiest LITS to get started on. More LITS puzzles can be found in LOTS O’ LITS by Grant Fikes and Prasanna Seshadri, in The Art of Puzzles 2, and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.