Welcome to GMPuzzles!

On this site we showcase “The Art of Puzzles”, with hand-crafted logic puzzles by the best puzzle designers for all who love puzzles. We organize into the categories of Sudoku, Number Placement, Object Placement, Shading, Region Division, and Loop/Path puzzles with tags on each post to find the easiest/hardest within particular styles.

In 2025, we’ve just restarted a series of posts focused on Sudoku, after offering a whole range of logic puzzles over 12 years of posts. So please watch our latest posts or check our archives depending on your interest. There are also many puzzles in our subscriptions and books so check out our Store for more details.

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Fives Sudoku by clover!

The number five proves to be a versatile clue in this mathematical GAS puzzle by Clover. Please continue the celebration of five years of GAS by solving this Sudoku.

Fives Sudoku by Clover

PDF

or solve online (using SudokuPad)

Author/Opus: This is the 24th 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). Numbers separated by a white circle either add up to 5 or have a difference of 5. Not all possible circles are necessarily given.

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

Thomas Hits the GAS (highlight to view): 1:58, 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; solving video with explanation to be added later from GAS team.

Note: Follow this link for more Genuinely Approachable Sudoku puzzles on this site. 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.

Sudoku by Philip Newman

Philip Newman gained early attention in the Sudoku world from the very interesting yet very hard classic puzzle Tatooine Sunset. The basic Tatooine grid geometry has been explored many more times with many kinds of solving paths, including in today’s Genuinely Approachable Sudoku.

Sudoku by Philip Newman

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Tatooine Thursday?

Author/Opus: This is the 5th puzzle from Philip Newman, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Standard Sudoku rules.

GAS Time Standards (highlight to view): Two party hats (🎩🥳): 8:00; One party hat (🥳): 20:00. All other solvers earn a 🦕: Quick Qaikshaheen.

Thomas Hits the GAS (highlight to view): 2:24, 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 Genuinely Approachable Sudoku puzzles on this site. 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.

Outside 234 Sudoku by Bill Murphy

Today’s Genuinely Approachable Sudoku by Bill Murphy is a minor variation of a favorite style here at GMPuzzles: Outside Sudoku. Can you place all the numbers now that the outside clues refer to the second, third, or fourth cells in that direction?

Outside 234 Sudoku by Bill Murphy

PDF

or solve online (using SudokuPad)

Author/Opus: This is the 2nd puzzle from Bill Murphy, part of the Genuinely Approachable Sudoku (GAS) team.

Rules: Variation of Outside Sudoku 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 numbers are given outside the grid. These numbers must appear in the second, third, or fourth cell in the corresponding direction.

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

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 and solving video with explanation from GAS team.

Note: Follow this link for more Genuinely Approachable Sudoku puzzles on this site. 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.

Ready Layer Cake by Thomas Snyder

Some people have asked if the Sudoku wedding is a lie. How can it be, we’ve prepared cake!

by Thomas Snyder

PDF

Potentially to be adapted to SudokuPad, but cake is better together in person.

Author/Opus: This is the 579th puzzle from Thomas Snyder, aka Dr. Sudoku.

Instructions:
1.) If you are a relatively new intelligence, and are not tall enough to reach most places above the ground, prove your primary education by telling us the [ENTRY].
2.) If you are now an older intelligence, have completed secondary education and solved lots of puzzles, then please take a bigger look at the image and show us [GRID]. Adjacent to any square filled wholly with a color AND with a number that rhymes with that color in English, there must be two other numbers whose product is the square of the colored square number.
3.) If you are now an advanced (perhaps artificial) intelligence, please limit your special powers to just seeing black, violet, and ultraviolet. Interpret what you see to show us [GRID].
4.) If you are an actually intelligent human who wants a good puzzle but doesn’t want to use a computer or be a [🐰🥚], skip step (3) but still consider it. Seeing the world in more than black and white but not down about the past, solve this P = NP starting with NP, as in Number Place. As NP was borrowed, another name might help find the way to [GRID].
5.) What heights you’ve reached. Look around to find P = [PLACE WE BAKED CAKE].

Author’s Note: No matter what the instructions say, I like to think of Layer 1 as basic old number placing, Layer 2 as early sudoku after being borrowed from America, Layer 3 as new tool-assisted designs for better or worse, and Layer Two plus Two and Layer Two plus Two as something blissfully blue, that makes you ask if I am crazy or brilliant. That really matters on who’s asking and who’s in charge.

Note 2: The PDF or PNG versions are the only definitive source at the moment, but future forms may be shared digitally that are appropriate for a few of the early layers once others have made progress.

Sum Dashes Sudoku by clover!

Can you dash your way around this Sudoku variation by Clover where certain cells must equal the sum of their neighbors?

Sum Dashes Sudoku by Clover

PDF

or solve online (using SudokuPad)

Author/Opus: This is the 23rd 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 horizontal dash appears in a cell, the number in that cell is the sum of the numbers to its immediate left and right. If a vertical dash appears in a cell, the number in that cell is the sum of the numbers immediately above and below it.

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

Thomas Hits the GAS (highlight to view): 2:32, 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 more Genuinely Approachable Sudoku puzzles on this site. 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.

Wedding Gift #1 by Thomas Snyder

A prior post discussed how I’m getting “married” to Sudoku over this upcoming year, with different ideas for something old, something new, something borrowed, and something blue. I may eventually tell more of the story of this puzzle that seems to capture all four.

by Thomas Snyder

PDF

or solve online (using SudokuPad)

Theme: But I Still Have Things to Say

Author/Opus: This is the 578th puzzle from Thomas Snyder, aka Dr. Sudoku.

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 (as shown below). Also, numbers placed into a cell filled wholly or partially with a primary or secondary color cannot rhyme with the name of that color in English.

Note: Follow this link for more atypical things on this site by Thomas Snyder, not only puzzles. A great starting point for atypical things that are mostly puzzles is this Twelve Days of Sudoku framing post.

Thermo-Sudoku by Philip Newman

Today’s post continues our three post introduction to the Genuinely Approachable Sudoku team with a clever Thermo-Sudoku puzzle by Philip Newman highlighting the new GAS + GMP connection.

Thermo-Sudoku by Philip Newman

PDF

or solve online (using SudokuPad)

Theme: Granularly Amassable Sudoral

Author/Opus: This is the 4th 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 (🎩🥳): 8:30; One party hat (🥳): 20:00. All other solvers earn a 🦕: Overheated Oharasisaurus.

Thomas Hits the GAS (highlight to view): 3:46, 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; solving video with explanation to be added later from GAS team.

Note: Follow this link for more Genuinely Approachable Sudoku puzzles on this site. 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.

Anti-Knight Sudoku by Bill Murphy

Today we continue to introduce the Genuinely Approachable Sudoku (GAS) team here on GMPuzzles with an Anti-Knight Sudoku by Bill Murphy with a nice geometric pattern with four empty rows.

Up/Down Lines Sudoku by Bill Murphy

PDF

or solve online (using SudokuPad)

Theme: Shut Up

Author/Opus: This is the 1st 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 cannot repeat in any cells separated by a chess knight’s move.

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

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 and solving video with explanation from GAS team.

Note: Follow this link for more Genuinely Approachable Sudoku puzzles on this site. 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.

Up/Down Lines Sudoku by clover!

As mentioned earlier today, we’re proud to now be a publication source for the daily Genuinely Approachable Sudoku (GAS) puzzle which celebrates the start of its fifth year of posts today. This Up/Down Lines Sudoku comes from Clover, the founder of the series back on June 7th, 2021.

Up/Down Lines Sudoku by Clover

PDF

or solve online (using SudokuPad)

Theme: Four Years

Author/Opus: This is the 22nd 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).

Along each gray line, every number is either greater than all the numbers it is directly connected to, or less than all of the numbers it is directly connected to. (Note that this results in a pattern of high/low/high/low along the length of each line.)

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

Thomas Hits the GAS (highlight to view): 3:20, 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 Genuinely Approachable Sudoku puzzles on this site. 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.

GMPuzzles is now cooking with GAS

TL;DR: Our goal to step into more things in Sudoku means working with some of the important new voices in Sudoku. Starting today, Grandmaster Puzzles is partnering with the Genuinely Approachable Sudoku (GAS) team to publish their daily puzzle on this site, helping to gain more visibility and a wider audience for this great sudoku series, and setting the stage for more joint projects in the future to showcase the art of sudoku. I’m quite excited to welcome Clover, Philip, Bill, and their puzzles to our community!

Genuinely Approachable Sudoku logo by 8th

Long form: Over the last year, the GMPuzzles team has become involved in making daily games for other partners, primarily easier logic games that still demonstrate all the potential of hand-crafted design. These games have become a part of the daily routine for a large audience including casual solvers who have never experienced a lot of puzzle types before. However, we haven’t been able to have regular content on this blog because of the time it takes to create and edit these puzzle projects.

Still, the focus on daily puzzles sparks a question: “Thomas, if you had to choose a puzzle to do every day, not from GMPuzzles, what would it be?” Here I have an immediate answer: Genuinely Approachable Sudoku.

Whatever you think of the pandemic-era Sudoku boom, that made Sudoku streaming and very difficult stunt puzzles more common, that made “Snyder notation” a terminology even if not applied like I did to win three world titles, the “second boom” didn’t change much about the way I think about Sudoku or why I love certain puzzles. That is because it takes a lot more than passion alone, or computer tooling and assisted generation that make publishing easier, to achieve a great puzzle. Almost anyone can mash a subset of a hundred variation ideas together in random ways and have something “new”, but the steps to make a masterpiece are harder. It takes human creativity matched with editing feedback and the instinct to think like the solver, to make a puzzle beautiful in all the ways a puzzle can be when you were first getting into puzzles, and not only making the next puzzle for yourself which is crazy hard and misses the audience.

I’ll admit that I haven’t tracked the dozens of individual authors that have popped up since 2020 very much. And no solver has shared a Sudoku from Logic Masters Deutschland with me because they found it super cool and thought I should see it. So a lot of the pandemic boom has just passed me by, much as the 2005 Sudoku boom probably passed all of Japan by because nothing “new” came out of it for the Japanese nanpure/Sudoku audience.

But I have been watching out for the first effort that set out and achieved an interesting and important goal: making an easy sudoku variation every day that can get more people into solving Sudoku of all kinds. That takes a lot more than basic puzzle making to pull off.

The Genuinely Approachable Sudoku (GAS) project was started by Clover four years ago today (June 7, 2021). Since week two it has comprised a group of three authors/editors/superstars working together, originally Clover, Philip Newman and Sam Cappleman-Lynes; since late 2022, Bill Murphy has replaced Sam. Every day they have made an approachable puzzle that may help a new/unfamiliar variation make sense to an audience that hasn’t seen it before, or they may bring something fresh to a regular style whether it is the solver’s first or one hundredth solve. They have created an on-going series and a devoted audience, and recently they added me to those ranks.

I was curious to learn how the GAS team gained their “editing” prowess, since that usually takes outside / experienced voices. I won’t reveal their approach, but I was able to work with some of the team at SudokuCon both in writing puzzles and running events. I usually have a lot of comments when first working with a puzzle author; that I had “no notes” for Clover’s Just One Cell puzzles which have posted here on the blog over the last few weeks is one sign of my respect for these next-generation authors. They have found a way to do something similar in spirit but different in execution to my own goals for GMPuzzles.

GAS chooses variations I love, and also chooses variations I wouldn’t touch (sometimes for good reasons and sometimes where I have judged too soon the value of a rule set and should look again). They usually do it with elegant “Just One Cell”-like simple break-ins that are unique to the individual puzzles and add to the fun as Ahas that confirm you understand the rules and designer intent.

While GMPuzzles will be posting the puzzles here, GMP is not going to add our own editorial decisions/processes unless asked. We want the full breadth of GAS ideas to come in for awhile as is, exposing our audience and me to some new ideas. I’ll be solving every day alongside you to see what pops up, sharing my blind solve times and steps in SudokuPad and sometimes my comments. Some days I will be slow (solving online in SudokuPad without Snyder notation is hard but I’ll try to get used to it, maybe by making new notations that are possible there). Other days I might solve faster than you expect because I’m in the author’s head as they are constructing something I’ve thought about before. For sure, we don’t know all the ways we’ll be able to support each other across Sudoku projects yet, but this collaboration should let us do more things for the good of Sudoku.