PDF

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

Theme: Sudoku Crew

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

Rules: Standard Killer Sudoku rules and Thermo-Sudoku rules. Specifically, insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region. Also, the sum of the digits in each cage must equal the value given in the upper-left corner of that cage. Digits cannot repeat inside a cage. Some thermometer shapes are in the grid; numbers must be strictly increasing from the round bulb to the flat end.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 7:30, Master = 11:15, Expert = 22:30

Solution: PDF and solving video.

Note: Follow this link for more Killer Sudoku and this link for classic Sudoku. More Killer Sudoku puzzles can be found in Killer Sudoku by Serkan Yürekli. 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 and Masterpiece Sudoku Mix 2.

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: Fortysomething?

Author/Opus: This is the 393rd puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Yajilin rules. Also, an even number of cells must be shaded in each row and in each column.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 3:15, Master = 4:15, Expert = 8:30

Solution: PDF and solving video.

Note: Follow this link for classic Yajilin and this link for Yajilin variations. If you are new to this puzzle type, here are our easiest Yajilin to get started on. More Yajilin puzzles can be found in The Art of Puzzles 2, in Yajilin by Murat Can Tonta and Prasanna Seshadri, and in our beginner-friendly book Logic Puzzles 101.

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: Divided by 1

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

Rules: Standard Yajilin rules. Also, the loop must go straight through the cells with white circles, with a turn in at least one of the cells immediately before/after each white circle. The loop must make a turn in all the black circles, but must go straight in both cells immediately before/after each black circle.

Difficulty: 2.5 stars

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

Solution: PDF and solving video.

Note: Follow this link for classic Yajilin and this link for Yajilin variations. If you are new to this puzzle type, here are our easiest Yajilin to get started on. More Yajilin puzzles can be found in The Art of Puzzles 2, in Yajilin by Murat Can Tonta and Prasanna Seshadri, and in our beginner-friendly book Logic Puzzles 101.

PDF

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

Theme: Any Questions?

Author/Opus: This is the 10th puzzle from guest contributor David Altizio.

Rules: Standard Cross the Streams rules, except that the puzzle uses an early number system that only has the concepts of “one” and “many”. All number clues greater than 1 are represented by a + symbol.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 4:30, Master = 10:30, Expert = 21:00

Solution: PDF and solving video.

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. More Cross the Streams can be found in these e-books in our store.

PDF

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

Author/Opus: This is the 392nd puzzle from our contributing puzzlemaster Grant Fikes.

Rules: Standard Cross the Streams rules. Also, the grid is divided into 5×5 sections. It must be possible to pair sections up such that the shading of the section in each pair is identical. Sections may be rotated to be paired up, but not reflected.

Difficulty: 3 stars

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

Solution: PDF and solving video.

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. More Cross the Streams can be found in these e-books in our store.

Since 2021, we have posted some extra difficult Sunday Stumpers, about once a month. These will be quite tough puzzles, but with a logical path to be found (and solution videos to help). This eleventh Sunday Stumper of 2022 is a Parking Lot (Hex) puzzle by Murat Can Tonta. Can you pack in all the automobiles (using the empty center and other open space wherever necessary)? Note that we’ve referred to this style before as “Tren”; while not a common puzzle style, we are updating to the nomenclature “Parking Lot” for this stumper.

(view directly for a larger image)

PDF

or solve online (using our beta test of Penpa-Edit tools in Yajilin mode allowing line drawing and cell shading/unmarking; hitting tab can alternate to separate shading and edge drawing modes).

Theme: Empty Center

Author/Opus: This is the 234th puzzle from contributing puzzlemaster Murat Can Tonta.

Rules: Locate some automobiles in the grid having size 1×2 or 1×3. Each number in the grid should be part of an automobile, indicating the number of unoccupied cells the automobile can move to by traveling along its longest axis, stopped only by an edge of the grid or another automobile. (Unlike other variations of this puzzle, there are no extra automobiles without numbers here.)

Also, see this example:

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 21:00, Master = 30:00, Expert = 60:00

Solution: PDF and solving video.

Note: Follow this link for more Parking Lot puzzles.

Note that we’ve referred to this style before as “Tren” and this particular variation as “Ghost Tren”. While not a common puzzle style, we are updating to the nomenclature “Parking Lot” for “Tren” and “Parking Lot (Extra Parking)” for “Ghost Tren” for this style this week.

PDF

or solve online (using our beta test of Penpa-Edit tools in Yajilin mode allowing line drawing and cell shading/unmarking; hitting tab can alternate to separate shading and edge drawing modes).

Theme: Prime Edges

Author/Opus: This is the 380th puzzle from our managing editor Serkan Yürekli.

Rules: Locate some automobiles in the grid having size 1×2 or 1×3. Each number in the grid should be part of an automobile, indicating the number of unoccupied cells the automobile can move to by traveling along its longest axis, stopped only by an edge of the grid or another automobile. No more than one number can be in an automobile; automobiles can also be placed without any numbers, with no restrictions on their ability to move. All unused cells must be part of a single connected group.

Also, see this example:

Difficulty: 5 stars

Time Standards (highlight to view): Grandmaster = 12:30, Master = 20:00, Expert = 40:00

Solution: PDF and solving video.

Note: Follow this link for more Parking Lot puzzles.

PDF

or solve online (using our beta test of Penpa-Edit tools. Use left click to place mine, right click (in cell) to mark unused, right click (on edge/corner) to mark a note; hitting tab will also enable a shading mode. If you want more solving options, turn off Penpa-Lite option.)

Theme: Equal and Unequal

Author/Opus: This is the 425th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Minesweeper rules (with a hexagonal grid): Place a mine into some of the empty hexagonal cells so that each number represents the total count of mines in neighboring cells.

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 5:30, Master = 9:00, Expert = 18:00

Solution: PDF and solving video.

Note: Follow this link for classic Minesweeper puzzles on this website and this link for variations on Minesweeper puzzles. If you are new to this puzzle type, here are our easiest Minesweeper Puzzles to get started on. More Minesweeper puzzles can be found in The Art of Puzzles 2.

PDF

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

Author/Opus: This is the 246th puzzle from our contributing puzzlemaster Prasanna Seshadri.

Rules: Variation of Pentopia rules: Place some of the given tetrahexes in the grid so that no tetrahexes are in adjacent cells that share an edge. Tetrahexes cannot repeat in the grid; rotations and reflections of a tetrahex are considered the same shape. The arrow clues indicate all the six directions where the nearest tetrahexes are located when looking from that hexagonal cell. (Arrow clues cannot contain tetrahex shapes.)

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 2:30, Master = 4:45, Expert = 9:30

Solution: PDF and solving video.

Note: Follow this link for more Pentopia puzzles.

PDF

or solve online (using our beta test of Penpa-Edit tools in shading mode only.)

Theme: Triple Groups

Author/Opus: This is the 26th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Standard Battleships rules (with a hexagonal grid). Use the indicated fleet.

Difficulty: 2.5 stars

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

Solution: PDF and solving video.

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