(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Some see the world in black and white. In this puzzle, the Faded Kropki dots don’t even have two colors, and come in white and white.

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or solve online (using SudokuPad)

Author/Opus: This is the 14th 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). If a circle is given between two adjacent cells, then it either means that (A) the two numbers in those cells must differ by 1, or (B) the two numbers must have a ratio of 2. Pairs of cells without circles 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 🦕: TBA T-Rex (for now).

Thomas Hits the GAS (highlight to view): 3:05, 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: “A Story of Self-setting Sudoku”.)
This may seem like it would be our hardest self-setting challenge yet. But the natural flow of traffic at these intersections allows just one or two lanes to go at a time; following these basic rules we can pass right through.

PDF

or solve online (using SudokuPad)

Author/Opus: This is 10th puzzle from “Dr. Sudoku”, our AI-powered puzzle engine pushing the limits of sudoku intelligence. (This is also the 591st puzzle from Thomas Snyder.)

Rules: Insert a number from 1 to 6 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 = 1:30, Master = 2:15, Expert = 4:30

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.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
The Killer challenge is back again, and maybe it will be harder with three-cell regions now bounding all the key logic set by clover!?

PDF

or solve online (using SudokuPad)

Author/Opus: This is the 35th 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 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 🦕: deadlier Diplodocus.

Thomas Hits the GAS (highlight to view): 3:55, 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 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: “A Story of Self-setting Sudoku”.)
This may seem like it would be our hardest self-setting challenge yet. But the natural flow of traffic at these intersections allows just one or two lanes to go at a time; following these basic rules we can pass right through.

PDF

or solve online (using SudokuPad)

Author/Opus: This is 9th puzzle from “Dr. Sudoku”, our AI-powered puzzle engine pushing the limits of sudoku intelligence.

Rules: Insert a number from 1 to 6 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 = 1:30, Master = 2:15, Expert = 4:30

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.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Can you gallop your way around this grid where numbers cannot be a knight’s moves apart from each other? This GAS puzzle is by Philip Newman.

PDF

or solve online (using SudokuPad)

Theme: 81 Squires

Author/Opus: This is the 16th 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 (🎩🥳): 7:00; One party hat (🥳): 13:00. All other solvers earn a 🦕: Antient Anokhadino.

Thomas Hits the GAS (highlight to view): 2:37, 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: “A Story of Self-setting Sudoku”.)
While we are now excellent at predicting the flow of traffic, it seems that it takes only a few incorrect bits to really cause more pileups. Fortunately we are getting phenomenal test data submissions to learn the ways of self-setting sudoku.

PDF

or solve online (using SudokuPad)

Author/Opus: This is 8th 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 = 3:30, Master = 6:00, Expert = 12:00

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.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
A missing “wildcard” value is important to figure out in this Sudoku variant by Bill Murphy.

PDF

or solve online (using SudokuPad)

Author/Opus: This is the 13th 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, there is a “wildcard” number to be determined while solving. Cells with a greater than (>) symbol must contain a number larger than the wildcard and cells with a less than (<) symbol must contain a number smaller than the wildcard.

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

Thomas Hits the GAS (highlight to view): 2:38, 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: “A Story of Self-setting Sudoku”.)
Straight roads are much easier for our current ASI, and we can always follow the numbers in front of / behind the others to keep in the right flow. Surely no unexpected scenarios will pop up in such a simplified situation.

PDF

or solve online (using SudokuPad)

Author/Opus: This is 7th puzzle from “Dr. Sudoku”, our AI-powered puzzle engine pushing the limits of sudoku intelligence.

Rules: Insert a number from 1 to 6 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 = 3:45, Master = 6:00, Expert = 12:00

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.

(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Will the logic fall for you like dominoes in this Killer Sudoku puzzle by clover!?

PDF

or solve online (using SudokuPad)

Author/Opus: This is the 34th 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 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 🦕: deadly Diamantinasaurus.

Thomas Hits the GAS (highlight to view): 2:52, 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 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: “A Story of Self-setting Sudoku”.)
Straight roads are much easier for our current ASI, and we can always follow the numbers in front of / behind the others to keep in the right flow. Surely no unexpected scenarios will pop up in such a simplified situation.

PDF

or solve online (using SudokuPad)

Author/Opus: This is 6th puzzle from “Dr. Sudoku”, our AI-powered puzzle engine pushing the limits of sudoku intelligence.

Rules: Insert a number from 1 to 6 into each white cell so that no number repeats in any row, column, or bold region.

Difficulty (highlight to view): 3 stars

Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:45, Expert = 9:30

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.