(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
This Deficit Sudoku puzzle suffers from number deficiency anemia and needs a numeral infusion — stat!

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Theme: Anemia

Author/Opus: This is the 143rd puzzle from Philip Newman, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Deficit Sudoku rules, with numbers from 1-7: Insert a number from 1 to 7 into each cell so that no number repeats in any row or column. Some regions appear with fewer cells than there are numbers in the indicated range. No number repeats in these regions, but not all numbers will appear in each of these regions.

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

Thomas Hits the GAS (highlight to view): 1:35, 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

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.)
There’s something a little extra in each of the Arrow Sudoku clues in this variation by Bill Murphy; find what doesn’t count to discover the solution.

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Author/Opus: This is the 145th 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). Some arrow shapes are in the grid. The sum of all but one of the numbers along the path of each arrow must equal the number in the circled cell. Numbers can repeat within an arrow shape.

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

Thomas Hits the GAS (highlight to view): 3:15, 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

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 variation on Killer Sudoku, the odd and even numbers must stay in balance everywhere.

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Theme: Razor’s Edge

Author/Opus: This is the 158th 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). Also, in each cage, the sum of the odd numbers must equal the sum of the even numbers. Numbers cannot repeat inside a cage. (For example, a 5-cell cage might contain the numbers 2, 4, 5, 6, and 7 as 2 + 4 + 6 = 5 + 7.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:30; One party hat (🥳): 12:00. All other solvers earn a 🦕: sharp Shunosaurus.

Thomas Hits the GAS (highlight to view): 1:31, 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

Note: Follow this link for more Killer Sudoku and this link for classic Sudoku. More Killer Sudoku puzzles can be found in Killer Sudoku 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.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
A storm at a certain Sudoku setter’s house precipitated a leak around one of the windows. Let’s hope your Windoku-solving skills are more solid than the weather-proofing was.

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Theme: Leakin’ in the Rain

Author/Opus: This is the 125th 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). Each of the four 3×3 shaded regions must also contain the numbers 1 to 9 without repeats. Along each line, the numbers in every region it passes through have the same sum. (In this puzzle, for example, R4C5 + R5C4 = R6C3.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 8:00; One party hat (🥳): 15:00. All other solvers earn a 🦕: Procrastinating Punatitan.

Thomas Hits the GAS (highlight to view): 3:11, 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

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.)
With one less flight of stairs than usual for a Sudoku here, can you climb all the way to the top of this Skyscrapers Sudoku puzzle?

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Theme: 8-Story Skyscraper

Author/Opus: This is the 140th puzzle from Clover, 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). Also, each number in the grid represents the height of a building and the clues on the outside of the grid indicate how many buildings can be “seen” when looking from that direction. Taller buildings block the view of smaller buildings. (For example, if a row contains the numbers 15486732, then three buildings are seen from the left – 1, 5, and 8 – and four buildings from the right – 2, 3, 7, and 8 – with the other buildings blocked by taller buildings in front of them.)

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

Thomas Hits the GAS (highlight to view): 1:32, 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 classic Skyscrapers puzzles and this link for variations on Skyscrapers puzzles. If you are new to this puzzle type, here are our easiest Skyscrapers Puzzles to get started on. More Skyscrapers puzzles can be found in The Art of Puzzles, in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli, and in the e-book Skyscrapers by Ashish Kumar.

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.)
Unlike the Texas weather that can’t decide whether to be hot or cold, the temperatures here increase or hold steady in this Slow Thermo-Sudoku.

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Theme: Slow Ride

Author/Opus: This is the 108th 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). Some thermometer shapes are in the grid; numbers must either increase or stay the same in each cell going from the round bulb to the flat end. (For instance, a thermometer might contain the sequence 233577888 in that order.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 8:00; One party hat (🥳): 17:00. All other solvers earn a 🦕: Yawning Yamanasaurus.

Thomas Hits the GAS (highlight to view): 5:20, 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 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.)
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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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.)
Besides the standard Arrow Sudoku rules, in this grid there must be …/even/odd/… alternation in each cell from the bulb to the tip of the arrow.

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Theme: Not an Arrow Sudoku

Author/Opus: This is the 121st 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 equal the number in the circled cell. Also, along each arrow shape, the numbers (including the circled cell) alternate in parity. (For instance, 9 = 2 + 7 and 9 = 4 + 3 + 2 are valid sequences, but 9 = 7 + 2 and 9 = 1 + 3 + 5 are not.)

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 6:30; One party hat (🥳): 12:00. All other solvers earn a 🦕: forgot-a-constraint Fabrosaurus.

Thomas Hits the GAS (highlight to view): 2:13, 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.

[Editor’s Note / context: For those looking for more puzzles here besides Sudoku, we still don’t have new plans for this year. We need more focus on the large efforts we have underway and in general that still means on Sudoku and staying healthy until we can grow the team. But as editors, we too miss the unexpected submissions that surprise and delight.]
[Now you can’t just commission a “museum series” of unforgettable grids, but we were delighted by what happened here. A few months ago Thomas shared a photo (far below) he takes every time he visits the Philadelphia Museum of Art, thinking this grid by Mondrian will always deserve a puzzle when he can get to it. Without expectation of anything appearing, Martin delivered a tremendous fit for the grid, that used its elements fully, that added its own theme with just three kinds of givens that left us a bit shocked. We’re pleased to share now as a bonus for all to enjoy.]

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or solve online (using our beta test of Penpa-Edit tools; use the tab key to alternate between shading and number entry modes)

Author/Opus: This is the 18th puzzle from guest contributor Martin Ender.

Rules: Label some cells with numbers to form a single connected group of labeled cells; no gridpoint is entirely surrounded by numbered cells. Each bold region must contain at least one labeled cell. Each number (including any given numbers) must equal the total count of labeled cells in that region. Two cells containing the same number may not share a thick border.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 10:00, Master = 25:00, Expert = 50:00

Solution: PDF and solving animation.

Note: Follow this link for Nanro puzzles on this website and this link for variations on Nanro puzzles. If you are new to this puzzle type, here are our easiest Nanro Puzzles to get started on. More Nanro puzzles can be found in A Number o’ Nanro by Prasanna Seshadri.

Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our General Blog Puzzle Discussion on the GMPuzzles Discord.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Today’s Thermos may be Slow, but you don’t have to be overly cautious. Just remember that thermo digits can repeat in this variant!

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Theme: Good Grief

Author/Opus: This is the 96th 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). Some thermometer shapes are in the grid; numbers must either increase or stay the same in each cell going from the round bulb to the flat end. (For instance, a thermometer might contain the sequence 233577888 in that order.)

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

Thomas Hits the GAS (highlight to view): 2:36, 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 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.