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Theme: Frame

Author/Opus: This is the 321st puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Castle Wall rules.

Answer String: Enter the length in cells of the horizontal loop segments from left to right in the marked rows, starting at the top. If the loop only has vertical segments in the marked row, enter 0. Separate each row’s entry with a comma.

Time Standards (highlight to view): Grandmaster = 1:15, Master = 2:00, Expert = 4:00

Note: Follow this link for more Castle Wall puzzles. If you are new to this puzzle type, here are our easiest Castle Wall puzzles to get started on. More Castle Wall puzzles can be found in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.

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

Our next week of puzzles features Castle Wall; we will soon have a new e-book from Serkan Yürekli if you are interested in solving more Castle Wall 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 Castle Wall by Murat Can Tonta and a bonus Castle Wall 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.

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Theme: Half and Half

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

Rules: Standard Sudoku rules. Also, digits in circles must be odd and digits in squares must be even. The range of this puzzle is 1-6.

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

Note: Follow this link for other Even/Odd Sudoku. Follow this link for classic Sudoku.

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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

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.

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.

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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

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.