(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Trick and treat! Treat yourself to this tricky X-Sums Sudoku to celebrate 10/31. Happy Halloween!

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Theme: The Scariest Thing

Author/Opus: This is the 194th 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, the clues outside the grid indicate the sum of the first X numbers placed in the corresponding direction, where X is equal to the first number placed in that direction (e.g., because R3C1 is 6, the six numbers in R3C1, R3C2, and on to R3C6 all add up to 31).

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

Thomas Hits the GAS (highlight to view): 2:58, 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.)
Does an Anti-King Sudoku constitute lèse-majesté, or “injured majesty”? If so, we humbly beg your pardon for any offense this puzzle may give.

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Theme: Lèse-majesté

Author/Opus: This is the 169th 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). Also, cells sharing a corner cannot contain the same number (as if adding a chess king’s move constraint to each cell).

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

Thomas Hits the GAS (highlight to view): 4:46, 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.)
Two complete rows are given in this Quadruples Sudoku. Can you use the white circles to get the rest of your ducks, or rather digits, in a row?

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Theme: Angel Vision

Author/Opus: This is the 173rd 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). Numbers in white circles must appear in at least one of the four surrounding cells.

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

Thomas Hits the GAS (highlight to view): 2:18, 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.)
Get ready to blast off as you identify contiguous runs of increasing digits in this Max Ascending Sudoku.

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Theme: Blastoff

Author/Opus: This is the 193rd 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). Clues outside the grid indicate the exact length of the longest contiguous sequence of strictly increasing numbers in that row or column, starting from the direction of the clue. (For instance, the 5 to the left of row 5 indicates that the longest sequence of increasing numbers starting from the left is exactly 5 cells long like 12579, with no sequence in that row being longer.)

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

Thomas Hits the GAS (highlight to view): 2:20, 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

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.)
Brace yourself for this curly bracket-themed Anti-King Thermo-Sudoku with two critical variant rules to remember.

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Theme: {Curly Brackets}

Author/Opus: This is the 168th 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). Cells sharing a corner cannot contain the same number (as if adding a chess king’s move constraint to each cell). Also, 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 (🎩🥳): 8:00; One party hat (🥳): 15:00. All other solvers earn a 🦕: Feisty Fukuititan.

Thomas Hits the GAS (highlight to view): 3:46 on an earlier version of the grid with 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

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.)
Can you wind your way around this spiral-shaped Killer Sudoku?

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Theme: Cannonball

Author/Opus: This is the 172nd 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, the sum of the numbers in each cage must equal the value given in the upper-left corner of that cage. Numbers cannot repeat inside a cage.

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

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

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.)
This hybrid of Kakuro and Sudoku stretches the definition of both puzzle types and might just stretch your thinking as you solve it.

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Theme: Stretching the Definition

Author/Opus: This is the 192nd puzzle from clover!, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Variation of Kakuro and Sudoku. Insert a number from 1 to 7 into each white cell so that no number repeats in any row or column. Additionally, the sum of numbers in each Across entry equals the value given to the left of the entry, and the sum of numbers in each Down entry equals the value given above the entry.

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

Thomas Hits the GAS (highlight to view): 1:47, 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.)
This quatrefoil-shaped puzzle is reminiscent of a lucky four-leaf clover. May the road rise up to meet you as you solve this Sudoku! 🍀

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or solve online (using SudokuPad)

Theme: Worried Age

Author/Opus: This is the 172nd 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 (🎩🥳): 6:30; One party hat (🥳): 11:00. All other solvers earn an 🦕: Examplary Equijubus.

Thomas Hits the GAS (highlight to view): 3:53, 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 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.)
“Double, double toil and trouble.” — The Bard | In this twist on Arrow Sudoku, toil to make all your sums double-digit numbers.

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Theme: A Life So Wonderful

Author/Opus: This is the 171st puzzle from Bill Murphy, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Arrow 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 two-digit number read from left to right in the capsule. 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 🦕: Hysterical Halkszkapraptor.

Thomas Hits the GAS (highlight to view): 2:53, 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 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.)
You may need to take baby steps as you toddle your way around the grid in this XY-Differences Sudoku.

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Theme: Baby Steps

Author/Opus: This is the 191st 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). If a diamond is given between two horizontally adjacent cells, then the two numbers in those cells must differ by X, where X is the first number in that row. If a diamond is given between two vertically adjacent cells, then the two numbers in those cells must differ by Y, where Y is the first number in that column. Pairs of cells without diamonds can have any relationship. For instance, the difference between R1C3 and R1C4 is equal to the value in R1C1 (= 3).

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

Thomas Hits the GAS (highlight to view): 2:19, 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

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.