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Theme: One, Two, Three

Author/Opus: This is the 51st puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Standard Cross the Streams rules.

Answer String: Enter the length in cells of each of the black segments from left to right/top to bottom for the marked rows/columns, going in order from A to B to C to D and separating each entry with a comma.

Time Standards (highlight to view): Grandmaster = 2:45, Master = 4:00, Expert = 8:00.

Solution: PDF

Note: Follow this link for other Cross the Streams. If you are new to this puzzle type, here are our easiest Cross the Streams to get started on.

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

Theme: Given Symmetry

Author/Opus: This is the 144th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Nanro rules.

Answer String: Enter the length in cells of each of the segments labeled with numbers from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.

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

Solution: PDF

Note: Click here for other Nanro puzzles. If you are new to this puzzle type, please first try out the example on the Rules and Info page as well as this easy Nanro post.

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Theme: Invaluable

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

Rules: Standard TomTom rules, using the integers 1-5. Also, each cage must have a non-negative integer operation value (i.e., is equal to 0, 1, 2, 3, 4, …).

Answer String: Enter the 1st row from left to right followed by the 2nd row from left to right. Separate all rows with a comma.

Time Standards (highlight to view): Grandmaster = 3:15, Master = 7:00, Expert = 14:00

Solution: PDF

Note: Follow this link for variations of TomTom and this link for more classic TomTom. If you are new to this puzzle type, here are our easiest TomTom to get started on.

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Theme: Clumps of Givens

Author/Opus: This is the 142nd puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard TomTom rules, using the integers 1-6.

Answer String: Enter the 3rd row from left to right followed by the 4th row from left to right. Separate the rows with a comma.

Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:30, Expert = 9:00

Solution: PDF

Note: Follow this link for other classic TomTom. If you are new to this puzzle type, here are our easiest TomTom to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools; use Tab key to alternate between line drawing and shading)

Theme: Clue Symmetry and Logic

Author/Opus: This is the 59th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Variation of Nurikabe. Shade some empty cells black so that the grid is divided into white areas, each containing at most one number. A white area with a number must have the same area in cells as that number. White areas may only touch diagonally. All shaded cells must be connected with each other, but no 2×2 group of cells can be entirely shaded. Also, all shaded cells must be divisible into snakes with the heads and tails given in the grid. Snakes cannot cross each other.

Also, see this example:

Answer String: Enter the length in cells of each of the black segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma. This example has the key “7,32,31”.

Time Standards (highlight to view): Grandmaster = 3:30, Master = 4:45, Expert = 9:30

Solution: PDF

Note: Follow this link for other variations of Nurikabe and this link for more classic Nurikabe. If you are new to this puzzle type, here are our easiest Nurikabes to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools; in default linex mode: left-click+drag draws line, right click marks X on edge)

Theme: Getting Even

Author/Opus: This is the 6th puzzle from guest contributor Craig Kasper.

Rules: Draw a single loop in the grid which may cross itself orthogonally, but otherwise does not touch or retrace itself. The clue numbers to the left/right of the rows indicate the number of squares visited by the nearest section of the loop that travels horizontally in the rows. The clue numbers to the top/bottom of the columns indicate the number of squares visited by the nearest section of the loop that travels vertically in the columns.

Also, see this example:

Answer String: Enter the number of empty squares for each row from top to bottom, followed by a comma, and then the number of turns for each row from top to bottom. This example has the key “100000,422224”.

Solution: PDF

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

Note: Follow this link for other Round Trip puzzles. Some more Round Trip puzzles can be found in the book Loop Variety Collection by Ashish Kumar and Murat Can Tonta.

(View image directly for larger form.)

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Theme: Logical

Author/Opus: This is the 9th puzzle from guest contributor Hans van Stippent.

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

Answer String: For each row from top to bottom, enter the number of the column where the middle star appears. Enter just the last digit of any two-digit numbers, and enter all these numbers as a single string with no separators.

Time Standards (highlight to view): Grandmaster = 4:00, Master = 5:30, Expert = 11:00

Solution: PDF

Note: Follow this link for other classic Star Battles. If you are new to this puzzle type, here are our easiest Star Battles to get started on.

PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the composite Yajilin mode where left click marks cells, right click marks dots in cells or X’s on edges, left click+drag draws lines.)

Theme: White Hole

Author/Opus: This is the 1st puzzle from guest contributor John Bulten.

Rules: Standard Tapa rules.

Answer String: Enter the length in cells of each of the shaded segments from left to right for the marked rows, starting at the top. Separate each row’s entry from the next with a comma.

Time Standards (highlight to view): Grandmaster = 1:45, Master = 4:45, Expert = 9:30

Solution: PDF

Note: Follow this link for other classic Tapa. If you are new to this puzzle type, here are our easiest Tapa to get started on.

PDF

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

Theme: Logical (Originally on 2014 Hungarian Puzzle Championship)

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

Rules: Put the given shape into each box; the shape can be rotated and reflected. Relationship signs (<, =, >) indicate the relative number of shaded cells for that row/column in adjacent boxes.
See also this smaller example with four boxes:

Answer String: Enter the length in cells of the black shaded segments in the marked rows, starting at the top. Separate each row with a comma. Shaded groups continue across the box boundaries. The example has the key “5,32”.

Time Standards (highlight to view): Grandmaster = 3:30, Master = 4:30, Expert = 9:00

Solution: PDF

PDF

or solve online (using our beta test of Penpa-Edit tools using a composite mode where left click inside cell shades square, left click + drag draws line segment, right click inside cell adds dot, and right click on cell edge adds an x.)

Theme: Grid Symmetry and Logic (Originally on 2014 Hungarian Puzzle Championship)

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

Rules: Locate a snake in the grid, whose head and tail are given. The snake does not touch itself, not even diagonally, and cannot use any black squares. Numbers outside the grid indicate the number of snake cells in that row/column. See also this example:

Answer String: Enter the length in cells of each of the snake segments from left to right for the marked rows, starting at the top. Separate each row’s entry with a comma. This example has the key “2,13”.

Time Standards (highlight to view): Grandmaster = 1:15, Master = 2:00, Expert = 4:00

Solution: PDF