PDF

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

Theme: Half and Half

Author/Opus: This is the 320th puzzle from Thomas Snyder, aka Dr. Sudoku.

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

Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 6th row from left to right.

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

Solution: PDF

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 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 alternate between Sudoku = big entries and Number candidate = small entries in the corners of cells.)

Theme: Almost 1 to 9 Twice

Author/Opus: This is the 319th puzzle from Thomas Snyder aka Dr. Sudoku.

Rules: Standard Tight Fit Sudoku rules. Remember, the smaller number goes above the larger number in all slashed cells. The range of this puzzle is 1-9.

Answer String: Enter the 4th row from left to right, followed by a comma, followed by the 5th row from left to right. (Note: for the tight fit cells, enter the top before the bottom as would be normal for the read order.)

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

Solution: PDF

Note: Follow this link for other Tight Fit Sudoku puzzles on this website. If you are new to this puzzle type, here are our easiest Tight Fit Sudoku to get started on. More Tight Fit Sudoku can be found in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli and in The Art of Sudoku 2.

Our most recent variety week of puzzles can be found in this PDF.

We are now entering test-solving and final layout for The Art of Sudoku 2, a collection of classic Sudoku, the main variations Tight Fit, Even/Odd, Arrow, Thermo, and Consecutive Pairs, and some other variations. Our next week of puzzles contains some great Sudoku that almost made this book, spread across all the main styles that are included.

This week, our subscribers are getting early access to the full week of puzzles as well as images of the puzzle solutions and a video walkthrough of the Friday puzzle. Master+ subscribers to the site are getting a bonus Even/Odd Sudoku by Serkan Yürekli and a bonus Classic Sudoku by Serkan Yürekli. If you want to become a subscriber and get access to bonus puzzles, solutions, e-books, and other rewards, check out this page.

We’ve had some different personal matters affecting our two main editors over the last quarter, which has slowed us down some. Our next web week will officially go up 10/7-10/14, one week later than expected. We expect to have each of the next Sudoku, Castle Wall, and Battleships weeks posted on 10/7, 10/14, 10/21. Thanks for your patience.

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: Parquet

Author/Opus: This is the 318th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Slitherlink rules.

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

Time Standards (highlight to view): Grandmaster = 0:40, Master = 1:00, Expert = 2:00

Solution: PDF

Note: Follow this link for other classic Slitherlink. 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.

Our most recent week of Fillomino puzzles and variants can be found in this PDF.

We’re breaking our normal sequencing by having a variety mix this week (and in two weeks we should have the expected Sudoku week). We have six (+ two bonus for subscribers) puzzles across our other genres for you to enjoy.

This week, our subscribers are getting early access to the full week of puzzles as well as images of the puzzle solutions. Master+ subscribers to the site are getting a bonus Kurotto by Grant Fikes and a bonus Balance Loop by Serkan Yürekli. Our grandmaster subscribers also received a giant Samurai Sudoku by Ashish Kumar. If you want to become a subscriber and get access to bonus puzzles, solutions, e-books, and other rewards, check out this page.

Our most recent variety mix week can be found in this PDF.

This coming week features Fillomino and some variations on Fillomino. We have also added the e-book Fill o’ Fillomino 2 by Grant Fikes to our e-store, if you are interested in more Fillomino puzzles.

This week, our subscribers are getting early access to the full week of puzzles as well as images of the puzzle solutions. Master+ subscribers to the site are getting a bonus Fillomino (Symmetry) by Serkan Yürekli and a bonus Fillomino by Murat Can Tonta. Earlier this year, our grandmaster subscribers received the Fill o’ Fillomino 2 e-book. If you want to become a subscriber and get access to bonus puzzles, solutions, e-books, and other rewards, check out this page.

Our most recent week of sample puzzles from the book Intro to GMPuzzles can be found in this PDF. Find more info on this beginner-friendly title on this page, including PDF purchasing options. We are still working on a future soft-cover release of this book.

This coming week features another variety mix of puzzles from some guest authors and our puzzlemasters.

This week, our subscribers are getting early access to the full week of puzzles, a video walkthrough of the Saturday puzzle, as well as images of the puzzle solutions. Master+ subscribers to the site are getting a bonus Balance Loop by Serkan Yürekli and a bonus Pentatouch by Murat Can Tonta. If you want to become a subscriber and get access to bonus puzzles, solutions, e-books, and other rewards, check out this page.

Our most recent week of LITS puzzles can be found in this PDF.

This year we are working to reconstruct parts of our website to be more friendly for beginning solvers who are not familiar with all of these types. One part of this plan includes a new book, that we are releasing online today, called Intro to GMPuzzles by Serkan Yürekli. Serkan has constructed 252 elegant puzzles across 12 genres (21 puzzles per genre) to introduce solvers to the beauty and logic possible in Sudoku, Tapa, and other puzzle styles featured regularly at Grandmaster Puzzles. The puzzles are on the easy-medium side of difficulty, perfect for beginners but with some tricks and Aha moments even experienced solvers will enjoy.

So to mark the release of the book, we will have a 12-puzzle sampler this week with one puzzle from each genre released throughout the week. We’ll be back next week with a new variety mix week.

Our most recent Kakuro week can be found in this PDF.

This coming week features a set of LITS puzzles. (We will be taking one of our normally scheduled break weeks next week.)

This week, Master+ subscribers to the site are getting a bonus LITS by Serkan Yürekli and a bonus Cross the Streams (LITS) by Grant Fikes, as well as images of the puzzle solutions. If you want to become a subscriber and get access to bonus puzzles, solutions, e-books, and other rewards, check out this page.

Bonus news: As we mentioned last week, the book Puzzlecraft that I co-authored with Mike Selinker is being re-released. It has example puzzles and text describing how to make dozens and dozens of kinds of puzzles, including many of the standard genres here.

A print copy of the updated Puzzlecraft can be pre-ordered at Lone Shark Games. If you want a PDF e-book now, you can support this Game Design and Puzzlecraft Humble Bundle with proceeds going to Girls who Code and Girls Make Games. With the Humble Bundle, you will also receive a 20% off coupon for the print copy or other items from the Lone Shark Games site.