(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
This Almost Palindrome Sudoku follows the same rules as Palindrome puzzles, except that each gray line contains a mystery pair of mismatched digits.

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or solve online (using SudokuPad)

Theme: Off by One

Author/Opus: This is the 195th 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). The numbers along each gray line form a palindrome (i.e., read the same forwards and backwards), except for a single pair of non-matching numbers on each line, which must be identified by the solver.

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

Thomas Hits the GAS (highlight to view): 4:13, 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

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.)
We’ve reached that time of year when nights are noticeably longer than days. Time to don some comfy PJs, sip a mug of hot cocoa, and snuggle up with a good Anti-Knight Sudoku.

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or solve online (using SudokuPad)

Theme: Short Days, Long Antiknight

Author/Opus: This is the 170th 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, numbers cannot repeat in any cells separated by a chess knight’s move.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 10:00; One party hat (🥳): 20:00. All other solvers earn a 🦕: Homey Haestasaurus.

Thomas Hits the GAS (highlight to view): 5:22, 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.)
Trick and treat! Treat yourself to this tricky X-Sums Sudoku to celebrate 10/31. Happy Halloween!

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or solve online (using SudokuPad)

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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or solve online (using SudokuPad)

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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or solve online (using SudokuPad)

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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or solve online (using SudokuPad)

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.)
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.)
You may need to take baby steps as you toddle your way around the grid in this XY-Differences Sudoku.

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or solve online (using SudokuPad)

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.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Hungry? Chow down on this delicious one-sided sandwich from clover!.

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or solve online (using SudokuPad)

Theme: One-Sided Sandwich

Author/Opus: This is the 190th 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 sum of all numbers that appear before the 9 in that row or column, looking from that direction. (For example, a row with a clue of “6” to its left might start with values like 249, 1329, or 69.)

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

Thomas Hits the GAS (highlight to view): 2:02, 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.)
Colonizing Mars or the Moon sounds more like a matter of when than if these days, so perhaps we earthlings are the true space invaders. Get ahead of the trend by populating the grid of this Palindrome Sudoku.

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or solve online (using SudokuPad)

Theme: Space Invader

Author/Opus: This is the 170th 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). The numbers along each gray line form a palindrome (i.e., read the same forwards and backwards).

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

Thomas Hits the GAS (highlight to view): 2:44, 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.