Our latest e-book was just released to our store: Star Battle 2 by JinHoo Ahn and Murat Can Tonta. These two brilliant puzzlemakers have partnered to make this special set of 51 puzzles, including 35 classic Star Battles, 16 variations, with lots of visually and logically interesting challenges. Check this book out!

Our past week of Sudoku puzzles and variations is collected in this PDF and the solutions are in this PDF.

The daily solution videos are on the posts and linked below:

This next week will feature a variety mix of puzzles across six genres. There will also be a challenging Killer Sudoku as a Sunday Stumper posting in a few minutes.

PDF

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

Theme: Clones

Author/Opus: This is the 394th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Sudoku rules.

Difficulty: 1.5 stars

Time Standards (highlight to view): Grandmaster = 1:40, Master = 2:15, Expert = 4:30

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

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.

Our past week of Cross the Streams puzzles is collected in this PDF and the solutions are in this PDF.

The daily solution videos are on the posts and linked below:

This next week will feature Sudoku puzzles and variations. There will also be a challenging Killer Sudoku as a Sunday Stumper next weekend.

Our past week of Kakuro puzzles is collected in this PDF and the solutions are in this PDF. More Kakuro puzzles can be found in our e-store in the books Kakuro and Variations by Serkan Yürekli and The Art of Puzzles 2.

The daily solution videos are on the posts and linked below:

This next week will feature Cross the Streams puzzles.

Our past variety mix week of puzzles is collected in this PDF and the solutions are in this PDF.

The daily solution videos are on the posts and linked below:

This next week will feature Kakuro puzzles.

Our past variety week of Star Battle puzzles is collected in this PDF and the solutions are in this PDF. More Star Battle puzzles can be found in these books by Grandmaster Puzzles. We will have a new Star Battle 2 e-book by JinHoo Ahn and Murat Can Tonta later this fall.

The daily solution videos are on the posts and linked below:

This next week will be a variety mix of six different genres. We’ll also have a Sunday Stumper (Star Battle variation) posting in a few minutes.

Our past variety week of Round Trip puzzles is collected in this PDF and the solutions are in this PDF. More Round Trip puzzles, as well as other loop variety puzzles, can be found in the book Loop Variety Collection by Ashish Kumar and Murat Can Tonta.

The daily solution videos are on the posts and linked below:

This next week will feature Star Battle puzzles, including a Sunday Stumper at the end of the week. We’re working on another Star Battle book to release before the end of the year, and hope that you enjoy the Object Placement challenges this week.

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: 345

Author/Opus: This is the 393rd puzzle from Thomas Snyder, aka Dr. Sudoku.

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:

Difficulty: 3 stars

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

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

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.

Our past variety week of Spiral Galaxies puzzles is collected in this PDF and the solutions are in this PDF. More Spiral Galaxies can be found in The Art of Puzzles 2.

The daily solution videos are on the posts and linked below:

This next week of puzzles will contain Round Trip loop puzzles. We recently finished digitizing our (small) archive of other Round Trip puzzles for Penpa-Edit solving, as well as all of our Kakuro puzzles. A full list of completed genres is on our Penpa Notes page.

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: Double Ring

Author/Opus: This is the 392nd puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Variation of Spiral Galaxies. In addition to the standard rules, some circles are shaded gray and must belong to galaxies containing two gray circles, not one, with the circles in rotationally symmetric spots for those galaxies.

Difficulty: 4.5 stars

Time Standards (highlight to view): Grandmaster = 7:00, Master = 13:15, Expert = 26:30

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

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