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

Theme: 1234

Author/Opus: This is the 5th puzzle from guest contributor Murat Can Tonta.

Rules: Standard Cross the Streams rules.

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

Time Standards (highlight to view): Grandmaster = 6:15, Master = 14:00, Expert = 28:00.

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.

PDF

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

Theme: Logical

Author/Opus: This is the 119th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Double variations of Cross the Streams rules. First, both the shaded and the unshaded cells must be valid streams (single connected groups with no 2×2 areas). Second, while row clues act as usual and refer to shaded cells, the column clues refer to the distribution of white cells.

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

Time Standards (highlight to view): Grandmaster = 5:00, Master = 11:00, Expert = 22:00.

Solution: PDF; a solution video is available here.

Note: Follow this link for variations of Cross the Streams and this link for other classic 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)

Theme: Cage Symmetry and Logic (contributed by GMPuzzles to the Indian Puzzle Championship)

Author/Opus: This is the 181st puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Variation of TomTom rules. The letters A through J represent different digits from 0 to 9. Identify which letters stand for which digits and then solve the TomTom puzzle using the digit set {A < B < C < D < E < F} so that no digit repeats in any row or column and the value of each cage is correct using standard TomTom rules. Answer String: Enter the 3rd row from left to right followed by the 5th row from left to right. Separate all rows with a comma. Use digits (and not the letters A-F) for entry.

Time Standards (highlight to view): Grandmaster = 5:00, Master = 8:45, Expert = 17:30

Solution: PDF; a solution video is available here.

Note: Follow this link for other 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.

PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between ship placement and shading modes. In ship placement mode, right click gives sea, left click gives circle/square, left click and drag for rounded ships.)

Theme: Clue Symmetry and Logic

Author/Opus: This is the 6th puzzle from guest contributor Bram de Laat.

Rules: Standard Battleships rules. Also, the clues indicate the total number of white cells visible from that cell in the same row/column, not including the cell itself. The view of cells is blocked by ships. The following example image may help:

Answer String: For each row from top to bottom, enter the number of the first column from the left where a ship segment appears (enter both digits if a two-digit number). If the row is empty, enter 0. Enter these numbers as a single string with no separators.

Time Standards (highlight to view): Grandmaster = 8:30, Master = 13:30, Expert = 27:00

Solution: PDF

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

PDF

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

Theme: Cage Symmetry and Logic (contributed by GMPuzzles to the Indian Puzzle Championship)

Author/Opus: This is the 115th puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard TomTom rules, using the integers 1-8.

Answer String: Enter the 5th row from left to right followed by the 5th column from top to bottom. Separate all rows with a comma.

Time Standards (highlight to view): Grandmaster = 4:30, Master = 7:15, Expert = 14:30

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 to alternate between a composite mode for line/edge drawing and a shading mode.)

Theme: Clue Symmetry and Logic

Author/Opus: This is the 5th puzzle from guest contributing Bram de Laat.

Rules: Standard Araf rules. Also, no two regions with the same size can share an edge. (Note: this is the same rule as in Fillomino puzzles where no equal size polyominoes can touch.)

Answer String: Enter the number of cells in each connected group (between bold lines) in the marked rows.

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

Solution: PDF

Note: Araf is a relatively new puzzle for us on GMPuzzles. Follow this link for other Araf. An example image for a “classic” Araf puzzle is here.

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Theme: June Sun

Author/Opus: This is the 179th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Thermo-Sudoku rules.

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 = 6:45, Master = 9:30, Expert = 19:00

Solution: PDF

Note: Follow this link for more Thermo-Sudoku puzzles. If you are new to this puzzle type, here are our easiest Thermo-Sudoku to get started on. More Thermo-Sudoku puzzles can be found in The Art of Sudoku 2.

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: 13

Author/Opus: This is the 33rd puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Variation of Tapa Rules. Here, the clue cells can also be blackened. This means every clue is valid for all surrounding cells (up to 9) including itself. Each clue must indicate the size of all contiguous shaded groups around it. This example image should help:

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 = 4:30, Master = 8:15, Expert = 16:30

Solution: PDF; a solution video is available here.

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

PDF

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

Theme: Clue Symmetry and Logic

Author/Opus: This is the 50th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Divide the grid into gray and white regions, each containing exactly one number and with an area equal to that number. Numbers in white cells are part of white regions; numbers in gray cells are part of gray regions. Same colored regions cannot share an edge.

This example image should help:

Answer String: Enter the length in cells of each group (white and gray) in the marked rows. Separate the rows with a comma. For the Example, this is “13,121”.

Time Standards (highlight to view): Grandmaster = 3:15, Master = 6:30, Expert = 13:00

Solution: PDF

PDF

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

Theme: Clue Symmetry and Logic

Author/Opus: This is the 49th puzzle from our contributing puzzlemaster Serkan Yürekli.

Rules: Divide the grid into gray and white regions, each containing exactly one number and with an area equal to that number. Numbers in white cells are part of white regions; numbers in gray cells are part of gray regions. Same colored regions cannot share an edge.

This example image should help:

Answer String: Enter the length in cells of each group (white and gray) in the marked rows. Separate the rows with a comma. For the Example, this is “13,121”.

Time Standards (highlight to view): Grandmaster = 2:45, Master = 4:15, Expert = 8:30

Solution: PDF