(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Stomp around the grid with these four-legged circles in today’s Quadruples Sudoku. Some feet are off the ground, so you’ll have to work out what digits they are!

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or solve online (using SudokuPad)

Theme: Tetrapod Quads

Author/Opus: This is the 105th 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). Numbers in white circles must appear in at least one of the four surrounding cells.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 7:30; One party hat (🥳): 15:00. All other solvers earn a 🦕: Venerated Venenosaurus.

Thomas Hits the GAS (highlight to view): 3:27, 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 the Genuinely Approachable Sudoku (GAS) series.)
Today we have another trip to the Borderland with Bill showing a puzzle where each diamond indicates the size of an odd or even group of numbers.

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or solve online (using SudokuPad)

Author/Opus: This is the 103rd puzzle from Bill Murphy, 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). A cell containing a diamond is part of a group of numbers of the same parity connected by edges, and the number inside the diamond indicates how many numbers of the same parity (including itself) form this group. (For example, a diamond containing a 2 must be connected by its edges to only one other even number besides itself; that is, all other edge neighbors of these two numbers must be odd.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 9:00; One party hat (🥳): 17:00. All other solvers earn a 🦕: Handsome Jaxartosaurus.

Thomas Hits the GAS (highlight to view): 4:33, 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; solving video with explanation to be added later 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 the Genuinely Approachable Sudoku (GAS) series.)
Another Arrow Sudoku variation today with no requirement the sums match the arrow circles, just that they do not go over.

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or solve online (using SudokuPad)

Theme: Still Not an Arrow Sudoku

Author/Opus: This is the 124th puzzle from Clover, 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). Some arrow shapes are in the grid; the sum of the numbers along the path of each arrow must be less than or equal to the number in the circled cell.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 7:00; One party hat (🥳): 13:00. All other solvers earn a 🦕: mathphobic Martharaptor.

Thomas Hits the GAS (highlight to view): 2:14, 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 Arrow Sudoku. If you are new to this puzzle type, here are our easiest Arrow Sudoku to get started on. More Arrow Sudoku 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 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 the Genuinely Approachable Sudoku (GAS) series.)
GAS heats up with this Thermo Sudoku, where the 3s are all given.

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or solve online (using SudokuPad)

Theme: Free Threes

Author/Opus: This is the 104th puzzle from Philip Newman, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Thermo-Sudoku rules. (Insert a number from 1 to 9 into each cell so that no number repeats in any row, column, or bold region. Some thermometer shapes are in the grid; numbers must be strictly increasing from the round bulb to the flat end.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:00; One party hat (🥳): 12:00. All other solvers earn a 🦕: Ubiquitous Uberabatitan.

Thomas Hits the GAS (highlight to view): 2:35, 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; solving video with explanation to be added later from GAS team.

Note: Follow this link for more Thermo-Sudoku puzzles. If you are new to this puzzle type, here are our easiest Thermo-Sudoku to get started on. More Thermo-Sudoku puzzles 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 some Thermo-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 the Genuinely Approachable Sudoku (GAS) series.)
In a (45-degree) twist from regular Consecutive-style puzzles, here the connected cells all sit on a diagonal.

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or solve online (using SudokuPad)

Theme: Free Center

Author/Opus: This is the 102nd puzzle from Bill Murphy, 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). Also, numbers adjacent to each other along the gray lines must differ by 1. Numbers may repeat on the gray lines. Diagonally adjacent numbers that do not have a gray line can have any relationship.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 7:30; One party hat (🥳): 14:00. All other solvers earn a 🦕: Parallel Pampadromaeus.

Thomas Hits the GAS (highlight to view): 2:48, 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; solving video with explanation to be added later 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 the Genuinely Approachable Sudoku (GAS) series.)
In this fresh variation of Sudoku, the numbers in the diamond cells indicate the size of the odd or even group they belong to. Careful counting and shading should get you through to the solution.

PDF

or solve online (using SudokuPad)

Theme: On the Border

Author/Opus: This is the 123rd puzzle from Clover, 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). A cell containing a diamond is part of a group of numbers of the same parity connected by edges, and the number inside the diamond indicates how many numbers of the same parity (including itself) form this group. (For example, a diamond containing a 2 must be connected by its edges to only one other even number besides itself; that is, all other edge neighbors of these two numbers must be odd.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 9:00; One party hat (🥳): 17:00. All other solvers earn a 🦕: borderline Bothriospondylus.

Thomas Hits the GAS (highlight to view): 4:19, 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 the Genuinely Approachable Sudoku (GAS) series.)
Is it… really a normal Sudoku this time from Philip?

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or solve online (using SudokuPad)

Theme: Happy Little… Too Soon?

Author/Opus: This is the 103rd 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.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 5:00; One party hat (🥳): 10:00. All other solvers earn a 🦕: Tap-Dancing Tapuiasaurus.

Thomas Hits the GAS (highlight to view): 2:08, 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 the Genuinely Approachable Sudoku (GAS) series.
One highlight of working with the GAS team is seeing how they play with different kinds of ideas to open up solving possibilities. We hope you enjoy this vvvvv-ery fun Classic Sudoku that shows you don’t need extra rules if you have a good idea to construct.

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or solve online (using SudokuPad)

Theme: VVVVV

Author/Opus: This is the 101st puzzle from Bill Murphy, 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.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 5:50; One party hat (🥳): 11:00. All other solvers earn a 🦕: Viridian Velafrons.

Thomas Hits the GAS (highlight to view): 2:04, 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; solving video with explanation to be added later 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 the Genuinely Approachable Sudoku (GAS) series.)

As long-time solvers of Genuinely Approachable Sudoku will know, we at GAS, Inc. have a reputation. Of approachable puzzles, bordering on the side of far too generous with givens? Of course. But also a reputation for state-of-the-art security.

Now, more than ever, it is my job as Head of Security to implement cutting-edge artificial intelligence solutions to protect our ever dwendling precious resource: hats. To reassuring our valued solvers that we remain a safe place to hang your hat in these turbulent times, I am proud to invite you to be the first Beta Testers of our new security system. Backed by a powerful LLM trained on the mind of an extinct sauropod, you’ll find our website is more secure than ever.

https://sudokutheory.com/gas/security/captcha.html

GAS – We’re there at the drop of a hat

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
UPDATE from clover!: Good morning, friends! I hope you all enjoyed Bill’s April Fools CAPTCHA earlier today. Now that we’ve got that out of our systems, here’s today’s real GAS: a classic sudoku. Normal sudoku rules apply. And that’s it!

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or solve online (using SudokuPad)

UPDATE 2 from clover!: I hear you, I hear you. “Clover, something is wrong. Clover, we want more digits. Clover, our lack of creativity is preventing us from solving your beautiful sudoku.” Fine, I’ll give you one more digit, but you’re going to have to work for it. 😤 Here’s another classic sudoku that I set extra-special just for you. Normal sudoku rules apply. Once you’ve solved it, simply take the digit from r2c5, and place it in r1c1 in the previous sudoku. That should help you out a bit. And that’s it!

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or solve online (using SudokuPad)

UPDATE 3 from clover!: You may think I’ve singlehandedly tripled the GAS team’s count of non-unique sudoku in just a few hours, but you’d be wrong. I’ve actually quadrupled it. Are you almost ready to solve the puzzle, friends? Here you go: Normal sudoku rules apply. Solve this puzzle, and then take the digit from r1c9, and put it into r5c2 in the previous sudoku. That ought to do it!

PDF

or solve online (using SudokuPad)

UPDATE 4 from clover!: Mea culpa, I knew I was forgetting something. Regarding the hats and/or dinosaurs: to earn them, simply take the digit from r9c9 in the first sudoku I posted this morning, and place it in r7c3 in the sudoku immediately preceding this post. The timer stops when you successfully solve all of the sudokus in this post. 😉 

Theme: Patience is a Virtue

Author/Opus: This is the 122nd puzzle from Clover, 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.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 20:00; One party hat (🥳): 30:00. All other solvers earn a 🦕: waited-for-it Wintonotitan.

Solution: PDF; explanation from GAS team to be added later, because patience is a virtue.

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 Daily GAS discussion post on the GMPuzzles Discord. Not a member of the Discord? Click this link for basic access.