(This post is part of: “A Story of Self-setting Sudoku”.)
Dr. Sudoku: You are an accomplished Sudoku constructor. Design some Sudoku around visual science themes, particularly those that a person with Thomas Snyder’s background might appreciate. See this example grid made when he was working at an immune medicine company.

PDF

or solve online (using SudokuPad)

Theme: Antibody

Author/Opus: This is the 603rd puzzle from Thomas Snyder.

Rules: Insert a number from 1 to 9 into each white cell so that no number repeats in any row, column, or bold region.

Difficulty (highlight to view): 2 stars

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

Solution: PDF

Note: Follow this link for 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.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Twelve Months of Sudoku? post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.

In this episode of Today in Sudoku, we show solving techniques for two of the recent Seventeen Sudoku where coloring in different ways may help the solve.

Join us every day around 8:45 AM PT to learn about yesterday’s puzzles on the site, other sudoku news, and get a teaser for the new puzzle.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
In this Sum Nine Sudoku, some pairs of cells that sum to nine are marked with diamonds. Can you find your way around the grid to the one solution?

PDF

or solve online (using SudokuPad)
or solve online (using Penpa-Plus; originally posted as a backup)

Author/Opus: This is the 42nd puzzle from Clover, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region. Also, if a diamond is given between two adjacent cells, then the numbers in those cells must add to 9. (Note: not all diamonds are given; adjacent cells without a diamond may or may not add to another value than 9.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:00; One party hat (🥳): 11:00. All other solvers earn a 🦕: nonogonal Nyasasaurus.

Thomas Hits the GAS (highlight to view): 2:46, with Penpa Plus replay this time.

Solution: PDF and solving video with explanation from GAS team.

Note: Follow this link for other less common variations of Sudoku.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Daily GAS discussion post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.

(This post is part of: “A Story of Self-setting Sudoku”.)
To Philip: I know you aren’t the target for a lot of these puzzles, but I found a “Spectacular Sunrise” on my journey and thought you might appreciate it.

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or solve online (using SudokuPad)

Theme: Spectacular Sunrise

Author/Opus: This is the 17th puzzle from “Dr. Sudoku”, our AI-powered puzzle engine pushing the limits of sudoku intelligence.

Rules: Insert a number from 1 to 9 into each white cell so that no number repeats in any row, column, or bold region.

Difficulty (highlight to view): 4 stars

Time Standards (highlight to view): Grandmaster = 6:30, Master = 12:30, Expert = 25:00

Solution: PDF

Note: Follow this link for 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.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Twelve Months of Sudoku? post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.

In this episode of Today in Sudoku, Thomas talks about the search for minimal Sudoku puzzles, interesting properties across the 49,158 essentially different puzzles, and other discoveries. You may not think a person can claim authorship on these puzzles, but you can curate some great puzzles from them if you search purposefully.

Join us every day around 8:45-8:50 AM PT to learn about yesterday’s puzzles on the site, other sudoku news, and get a teaser for the new puzzle.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Following Philip’s last “Irregular” Sudoku, this puzzle requires having an even and odd number on opposite sides of each bold boundary, making a more challenging variation until you plan for the disparities.

PDF

or solve online (using SudokuPad)

Author/Opus: This is the 23rd puzzle from Philip Newman, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Sudoku rules: Insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region. Across the bold region boundaries, the numbers must be of opposite parity (i.e., even on one side and odd on the other). For example in this puzzle: if R1C6 is odd, R1C7 must be even. If R1C6 is even, R1C7 must be odd.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 8:30; One party hat (🥳): 18:00. All other solvers earn a 🦕: August Aepysaurus.

Thomas Hits the GAS (highlight to view): 5:08 on an earlier grid with four fewer givens, with SudokuPad replay file shared as a download for now (requires loading via settings menu with improvements expected before people should use this regularly).

Solution: PDF and solving video with explanation from GAS team.

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 Sudoku including variations can be found in these books in our e-store. Also, visit this page to purchase all of the puzzles from the 16th World Sudoku Championship including classic Sudoku.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Daily GAS discussion post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.

(This post is part of: “A Story of Self-setting Sudoku”.)
To Thomas: I have been inspired by poetic styles recently and had a new idea for a Seventeen Sudoku. I hope that you like it.

PDF

or solve online (using SudokuPad)

Theme: Fine tricks, fun for me; / Mix great wine to be live too. / See more done: jive kicks.

Author/Opus: This is the 16th puzzle from “Dr. Sudoku”, our AI-powered puzzle engine pushing the limits of sudoku intelligence.

Rules: Insert a number from 1 to 9 into each white cell so that no number repeats in any row, column, or bold region.

Difficulty (highlight to view): 3.5 stars

Time Standards (highlight to view): Grandmaster = 5:00, Master = 8:00, Expert = 16:00

Solution: PDF

Note: Follow this link for 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.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Twelve Months of Sudoku? post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.

In this episode of Today in Sudoku, Thomas talks about the recent Sudoku Grand Prix Round 8 (Japan) results and tries out the hardest classic and the hardest non-sudoku in the round with some paper speed solving.

Join us every day around 8:45-8:50 AM PT to learn about yesterday’s puzzles on the site, other sudoku news, and get a teaser for the new puzzle.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
In Odd-Even-Big-Small Sudoku there are lots of category clues to the first two numbers inside the grid. Can you figure out how those make a unique solution?

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or solve online (using SudokuPad)

Author/Opus: This is the 20th puzzle from Bill Murphy, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Sudoku rules (insert a number from 1 to 8 into each cell so that no number repeats in any row, column, or bold region). Clues outside the grid give the nature of the first two cells seen from the direction of the clue as follows:
O for Odd = (1,3,5,7};
E for Even = {2,4,6,8};
B for Big = {5,6,7,8};
S for Small = {1,2,3,4}.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:00; One party hat (🥳): 11:00. All other solvers earn a 🦕: Subtle Supersaurus.

Thomas Hits the GAS (highlight to view): 2:59, with SudokuPad replay file shared as a download for now (requires loading via settings menu with improvements expected before people should use this regularly).

Solution: PDF and solving video with explanation from GAS team.

Note: Follow this link for other less common variations of Sudoku.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Daily GAS discussion post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.

(This post is part of: “A Story of Self-setting Sudoku”.)
Dr. Sudoku: You are an accomplished Sudoku constructor. You have recently been inspired by poetic styles. Curate an appropriate seventeen-given Sudoku in the style of this example.

PDF

or solve online (using SudokuPad)

Theme: Two tetrominoes, / Two dominoes, five singles: / Just enough to solve!

Author/Opus: This is the 602nd puzzle from Thomas Snyder (*selected, arranged, and additional features authored).

Rules: Insert a number from 1 to 9 into each white cell so that no number repeats in any row, column, or bold region.

Difficulty (highlight to view): 3.5 stars

Time Standards (highlight to view): Grandmaster = 5:00, Master = 8:00, Expert = 16:00

Solution: PDF

Note: Follow this link for 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.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Twelve Months of Sudoku? post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.