Japanese Sums by JinHoo Ahn

Japanese Sums by JinHoo Ahn

PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to shift between number entry and shading modes.)

Theme: High Five

Author/Opus: This is the 50th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: Place the numbers in the indicated range (1-5) in some of the cells so that no number is repeated in any row or column. Numbers on the outside of the grid indicate the sums of adjacent number groups in that row or column, in order. Each sum is separated by at least one unused cell. A ? can represent any sum of 1 or larger.

Japanese Sums Example

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:40, Master = 1:00, Expert = 2:00

Solution: To be posted tomorrow on this post once live.

Note: Follow this link for other Japanese Sums puzzles.

Snake Pit by JinHoo Ahn

Snake Pit by JinHoo Ahn

PDF

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: 234

Author/Opus: This is the 49th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: (Hybrid of Fillomino and Snake Puzzles.) Divide the grid along the boundary lines so that every cell belongs to a snake. A snake is a one-cell-wide path at least two cells long that does not touch itself, not even diagonally. Circled cells must be at one of the ends of a snake. A snake may contain one circled cell, two circled cells, or no circled cells at all. Numbered cells must be part of a snake with a length of exactly that number of cells. A snake may contain one number, multiple identical numbers, or no numbers at all. Two snakes of the same length cannot touch each other horizontally or vertically.

Also see this example:

Snake Pit by Carl Worth

Difficulty: 1.5 stars

Time Standards (highlight to view): Grandmaster = 1:00, Master = 1:40, Expert = 3:20

Solution: PDF and solving video.

Note: Follow this link for more Snake Pit puzzles. Follow these links for other Fillomino or Snake puzzles.

Star Battle (Hex) by JinHoo Ahn

Star Battle (Hex) by JinHoo Ahn

PDF

or solve online (using our beta test of Penpa-Edit tools; in composite Star Battle mode a left click places a star, right click in a cell marks off the cell, and a right click on an edge or vertex marks in a dot as a placement note.)

Theme: Parallelograms

Author/Opus: This is the 48th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: Rules: Fill some cells with stars so that each row (in a horizontal or either of two diagonal directions) and bold region contains the indicated number of stars. Stars cannot be placed in adjacent cells that share an edge.

Difficulty: 1.5 stars

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

Solution: PDF and solving video.

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.

Skyscrapers by JinHoo Ahn

Skyscrapers by JinHoo Ahn

PDF

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

Theme: Three’s Company

Author/Opus: This is the 47th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: Standard Skyscrapers rules.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 8:30, Master = 11:00, Expert = 22:00

Solution: PDF and solving video.

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

Sudoku by JinHoo Ahn

Sudoku by JinHoo Ahn

PDF

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

Theme: Meandering Sequences

Author/Opus: This is the 46th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: Standard Sudoku rules.

Difficulty: 3 stars

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

Solution: PDF and solving video.

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.

Statue Park (Tapa Clues) by JinHoo Ahn

Statue Park (Tapa Clues) by JinHoo Ahn

PDF

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

Theme: Octagon

Author/Opus: This is the 45th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: Standard Statue Park rules, using a standard pentomino set. Number clues are equivalent to white circles and cannot be shaded. Also, number clues behave like Tapa clues and indicate the length(s) of consecutive shaded block(s) in the neighboring cells.

See also this example:

Statue Park (Tapa Clues) Example by Serkan Yürekli

Difficulty: 4.5 stars

Time Standards (highlight to view): Grandmaster = 6:45, Master = 15:00, Expert = 30:00

Solution: PDF and solving video.

Note: Follow this link for other classic Statue Park and this link for Statue Park variations. If you are new to this puzzle type, here are our easiest Statue Parks to get started on. More Statue Park puzzles can be found in the ebook Statue Park by Murat Can Tonta.

Kuromasu by JinHoo Ahn

Kuromasu by JinHoo Ahn

PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the linex mode where left click+drag draws lines and right click marks X’s)

Theme: Double Sequences

Author/Opus: This is the 44th puzzle from our contributing puzzlemaster JinHoo Ahn.

Rules: Shade some empty cells black so that each number indicates the total count of white cells connected vertically and horizontally to that number including the numbered cell itself. Black cells cannot share an edge, and all white cells must belong to a single connected group.

Also see this example:

Kuromasu by Thomas Snyder

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:30, Master = 1:00, Expert = 2:00

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

Note: Follow this link for more Kuromasu puzzles.