Even/Odd Sudoku by Takeya Saikachi

This is a free “warm-up” puzzle; Season 4 subscribers will see today’s main puzzle in the same style posted at 9:05 AM PT.

Even/Odd Sudoku by Takeya Saikachi

PDF

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

Theme: Four i’s

Author/Opus: This is the 53rd puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Standard Even/Odd Sudoku rules (i.e., cells with a square contain an even digit; cells with a circle contain an odd digit).

Estimated Difficulty: 1.5 stars

Time Standards (highlight to view): Grandmaster = 0:45, Master = 1:15, Expert = 2:30

Solution: PDF and solving animation.

Note: Follow this link for more Even/Odd Sudoku puzzles. If you are new to this puzzle type, here are our easiest Even/Odd Sudoku to get started on. More Even/Odd Sudoku can be found in these books in our e-store.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Week 10 Discussion post on the GMPuzzles Discord.

Kakuro by Takeya Saikachi

This is a free “warm-up” puzzle; Season 4 subscribers will see today’s main puzzle in the same style posted at 9:05 AM PT.

Kakuro by Takeya Saikachi

PDF

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

Theme: Sequences

Author/Opus: This is the 52nd puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Standard Kakuro rules.

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:35, Master = 0:45, Expert = 1:30

Solution: PDF and solving animation.

Note: Follow this link for classic Kakuro and this link for Kakuro variations. If you are new to this puzzle type, here are our easiest Kakuro to get started on. More Kakuro puzzles can be found in these books in our e-store.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Week 6 Discussion post on the GMPuzzles Discord.

Pentopia by Takeya Saikachi

This is a free “warm-up” puzzle; Season 4 subscribers will see today’s main puzzle in the same style posted at 9:05 AM PT.

Pentopia by Takeya Saikachi

PDF

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

Theme: 3×3

Author/Opus: This is the 51st puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Standard Pentopia rules: Place some of the given pentominoes in the grid so that no pentominoes are in adjacent cells that share an edge or corner. Pentominoes cannot repeat in the grid; rotations and reflections of a pentomino are considered the same shape. The arrow clues indicate all the directions (up, down, left, and right) where the nearest pentominoes are located when looking from that square. (Arrow clues cannot contain pentomino shapes.) Also, see this example:

Pentopia by Prasanna Seshadri

Difficulty: 1.5 stars

Time Standards (highlight to view): Grandmaster = 1:15, Master = 1:45, Expert = 3:30

Solution: PDF and solving animation.

Note: Follow this link for more Pentopia puzzles and this link for other puzzles involving Pentominoes. More Pentopia puzzles can be found in these books in our e-store.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Week 5 Discussion post on the GMPuzzles Discord.

Araf (Loop) by Takeya Saikachi

This is a free “warm-up” puzzle; Season 4 subscribers will see today’s main puzzle in the same style posted at 9:05 AM PT.

Araf (Loop) by Takeya Saikachi

PDF

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

Theme: V Formation

Author/Opus: This is the 49th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Draw a single, non-intersecting loop that passes through all cells, including clue cells; the loop may either go straight through or turn at each clue. The length of each loop segment connecting the two circles must be any value between the numbers given in those circles.

See also this example:

Araf (Loop) Example by Takeya Saikachi

Difficulty: 1.5 stars

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

Solution: PDF and solving animation.

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.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Week 3 Discussion post on the GMPuzzles Discord.

Sunday Special: Instructionless by Takeya Saikachi

Takeya Saikachi presents us with a new loop genre in which you need to discover the rules by solving the example first.

Instructionless by Takeya Saikachi

PDF

or solve online (using our beta test of Penpa-Edit tools in default linex mode where left-click+drag draws line and right click marks X’s)

Theme: Triplets

Author/Opus: This is the 40th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: To solve the main puzzle, you must first discover the genre’s rules by solving the example puzzle.

Example: solve online

Instructionless Example by Takeya Saikachi

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 4:35, Master = 7:15, Expert = 14:30

Hints: 1. This is a loop puzzle style that involves visiting all cells, forming a single closed loop. But what do the number clues do?
2. When thinking the right way, each number clue will have two uses.
3. Looking at individual clues may not be enough.
4. Pair all the clues together (as passed through by the loop) and consider any special properties you find.
5. This puzzle draws inspiration from a region division puzzle with a four-letter name (rot13 = NENS) that also pairs clues together.

Solution: PDF and solving animation.

Note: Follow this link for other Loop/Path puzzles.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our week-0-discussion thread on the GMPuzzles Discord. If you are not yet part of this Discord community, use this link.

Skyscrapers (Sum) by Takeya Saikachi

Takeya Saikachi’s warm-up puzzle, in which he places all possible odd clues symmetrically, will be good practice for the second grid today.

Skyscrapers (Sum) by Takeya Saikachi

PDF

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

Theme: Possible Odds

Author/Opus: This is the 39th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Variation of Skyscrapers; each clue represents the sum of the heights of the visible buildings in that direction.

Difficulty: 1 star

Time Standards (highlight to view): Grandmaster = 0:20, Master = 0:35, Expert = 1:10

Solution: PDF and solving animation.

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.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our week-0-discussion thread on the GMPuzzles Discord. If you are not yet part of this Discord community, use this link.

Star Battle (Hidden Double) by Takeya Saikachi

It seems amazing that Sagittarius A, a black hole, lies at the center of our galaxy, so one may wonder where Takeya Saikachi’s design breaks apart from other unusual stellar possibilities.

Star Battle (Hidden Double) by Takeya Saikachi

PDF

or solve online (using our beta test of Penpa-Edit tools with Double Minesweeper mines standing for stars. Left clicking a cell places a star, left clicking a cell again places a second star. Right clicking a cell marks it empty with a cross, right clicking between cells places a dot for notation.)

Author/Opus: This is the 36th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Variation of Star Battle rules. There are three stars per row, column, and region. Cells with stars can contain either 1 or 2 stars, but stars can still not be placed in adjacent cells that share an edge or corner.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 4:15, Master = 5:15, Expert = 10:30

Solution: PDF and solving animation.

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.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Season 2 Preview Week Discussion post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access and check subscriber instructions for role-related access.

Slitherlink by Takeya Saikachi

Slitherlink by Takeya Saikachi

PDF

or solve online (using our beta test of Penpa-Edit tools in edgex mode where left click+drag draws lines and right click marks X’s)

Theme: Similar Instances

Author/Opus: This is the 27th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Standard Slitherlink rules.

Difficulty: 2 stars

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

Solution: PDF and solving video.

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

Battleships (Hex) by Takeya Saikachi

Battleships by Takeya Saikachi

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.

Tapa-Like Loop by Takeya Saikachi

Tapa-Like Loop by Takeya Saikachi

PDF

or solve online (using our beta test of Penpa-Edit tools in linex mode where left click+drag draws lines and right click marks X’s on edges)

Theme: Groups of Three

Author/Opus: This is the 25th puzzle from our contributing puzzlemaster Takeya Saikachi.

Rules: Variation of Tapa: Form a single non-intersecting loop. Clues inside the grid represent the number of neighboring cells visited by the loop; if there is more than one number in a cell, each number should be represented with a separate loop segment. There is no 2×2 rule of Tapa in this puzzle.

See also this example:

Tapa-Like Loop Example by Serkan Yürekli

Difficulty: 2.5 stars

Time Standards (highlight to view): Grandmaster = 2:00, Master = 3:45, Expert = 7:30

Solution: PDF and solving video.

Note: Follow this link for other Tapa-Like Loop puzzles. More Tapa-Like Loop puzzles can be found in the Tapa-Like Loop Collection by Prasanna Seshadri.