The advertised “stats” update for 2014 will be coming later, but I did want to follow up on several requests from readers for the new year.

– I’ve already posted about our site navigation changes for 2015 but I wanted to mention again the new sidebar/”posts by category” and “posts by author” bits and make sure solvers are finding this to be an improvement.

– We received many requests for a way to distinguish the PDF files in a week as they sometimes get mixed after printing; we’re now adding the posting date to the top of all PDFs in 2015 which should help track things better.

– The biggest open ticket to address is a way to track the puzzles you’ve solved. Here I have to rely on our web developer at the moment so I can’t promise you any timeline, but I hear the request loud and clear. We’ll work through the challenges of merging the solving data with a representative calendar of our site posts and have something available as soon as possible.

– We’ll be adding some new puzzlemasters this year, but I won’t tell you who or when yet. That will be a surprise.

– Also on the horizon for early this year are some improvements to our estore, including more titles there (that only our patrons have seen), and a new header for the blog.

Now that we are doing so many things with daily puzzles and monthly ebooks and other collections, it is time to bring on some more freelancers to help with the site and with our books. There are projects that simply cannot move fast enough because I don’t have the time to complete them myself. Our most pressing need is for an artist that can create covers for our book collections. We’re looking for clean, professional art that showcases how special our puzzles are, with our The Art of Sudoku cover being a prime example. If you think you might be the person to help us with that, please contact us.

Congratulations to our contributing puzzlemaster Palmer Mebane for his dominant performance throughout the general competition at the recent World Puzzle Championship. Over the coming weeks we will post several of the puzzles Palmer wrote before the WPC as practice here, which should show you the dedication a puzzle champion must have to his craft.

As we get back into a regular schedule, you can find the set of puzzles we posted over the last two weeks gathered in this PDF. Here are the puzzles you can expect from Monday to Saturday this week (highlight to view):
Monday – Yajilin by Grant Fikes
Tuesday – Fillomino by Grant Fikes
Wednesday – Sudoku Variation by Thomas Snyder
Thursday – Star Battle by Thomas Snyder
Friday – Cross the Streams by Grant Fikes
Saturday – Smashed Sums Variation by Palmer Mebane

Now that the WPC is over, our focus is back on finishing our large book project “The Art of Puzzles”. This has taken awhile to put together as it has grown to be an over 250 puzzle title, with at least 25 puzzles in 10 different styles (Tapa, Nurikabe, Masyu, Slitherlink, TomTom, Skyscrapers, Fillomino, Cave, Star Battle, and Battleships). We have almost two dozen authors represented from around the world, including all of our contributing puzzlemasters to varying degrees. Grant Fikes deserves particular credit for the high quantity and quality of the puzzles he has provided (about 20%, basically tied with Dr. Sudoku) including many very large grids. One special treat is that the Tapa section was written entirely by Serkan Yürekli, the originator of the style and a true Tapa Master. You’ll definitely appreciate some of the surprises he packed into his puzzles. Some of the last tasks to do on the book now are to gather and write a really good set of hint/tutorial sections for the puzzles which may go into the book or may just end up online as an extra supplement. We are also looking through different printing and binding options and expect to offer both print and electronic forms of the book on release. Look for more announcements on “The Art of Puzzles” here soon.

Due to the World Sudoku and Puzzle Championships running now, we will have a “half” schedule of puzzles over the next two weeks as follows:

10/14 – Star Battle by Palmer Mebane
10/16 – Fillomino by Grant Fikes
10/18 – Sudoku Variation by Serkan Yürekli

10/22 – Masyu by Thomas Snyder
10/24 – TomTom Variation by Serkan Yürekli
10/26 – Tapa by Palmer Mebane

As some of you have suggested that a schedule of upcoming puzzles will be nice, I will try to give a weekly post with these plans going forward. I’ll also post a weekly PDF file after each week has concluded. Here is a PDF for week 41.

For those wondering about The Art of Puzzles and other projects, I’ll have more news on them in the next Doctor’s Note.

Best of luck and skill to all the competitors at the WSC and WPC.

–Dr. S

Last week saw the release of Puzzlecraft: The Ultimate Guide on How to Construct Every Kind of Puzzle, a really incredible project with Mike Selinker that was an extension of our GAMES Magazine articles that have run for many years (I joined Mike around article #48 when he wanted to write on how to construct Battleships. I’ve been part of the process ever since as we now approach #100). The title seems overly broad, but I challenge anyone to come up with a puzzle style that isn’t covered in the book.

Last week also saw Mike and I finish construction on a book you’ll get to see next year, Tile Crosswords, a word puzzle style that we developed out of the logic puzzle “Crack-It-On” that first appeared at the WPC in Hungary in the late 90s. You might not picture me as someone who fills grids with letters that have a meaning when considered as intact strings, let alone then provides sets of letters outside the grid that also form strings that evoke the sets of letters that are in the grid — certainly if I write about making word grids and cluing them that way it would seem impossible that I even speak English — but it is something I’ve been increasingly finding joy in doing.

The reason I mention all this is to give you some forewarning that over the coming months we may have other puzzle types than just sudoku and abstract logic puzzles here. Just as with the Hidden Contest that ended last week, I intend Grandmaster Puzzles to have all the kinds of puzzles I would like to solve, but with a friendly mix of easy to hard and lots of different genres so that if today is not your cup of tea, then tomorrow probably is. You may only think of me as a logic puzzle constructor, but working with Mike over the last few years has really developed my puzzle-making chops in almost every area.

Whatever puzzles we release here, they should still be worthy in their genres of being called masterpieces.

Sincerely,
Dr. S

I hope you enjoyed the first week with Grant Fikes contributing puzzles. Grant will be a regular author in the future, and has already sent in a lot of outstanding puzzles for The Art of Puzzles. While his best puzzles and his largest puzzles (sometimes one and the same) will be saved for that publication, a lot of fine leftovers will still end up here on a weekly basis. In other words, if you’ve enjoyed what you’ve seen here you’ll be amazed by what is in the book. Still, if you’d like to see some “Giants” from Grant, please check out the three he released last weekend 600 (LITS/”Tetra Firma”), 601 (Shakashaka/”Proof of Quilt”), and 602 (Norinori/”Dominnocuous”).

Who will our next Contributing Puzzlemaster be and when will his or her puzzles first appear? Only time will tell. For now I wanted to announce that the weekly release schedule will be going through a few changes. Since I have been publishing Sudoku and puzzles in five other genres (object placement, number placement, loops, shading, and region division), for most weeks going forward there will now be one puzzle in each of those six areas. Every other week will have a change in types (for example Masyu this week, Slitherlink the next) so there will be some balance in what gets posted. Over time, the genres will cycle through each day of the week so that easier and harder puzzles of all styles appear. That’s the basic plan, but there may be a few other surprises in store.

Finally, since a small number have been asking for more hints on the hidden contest (which remains undiscovered), and since I’ve not been responding privately for the sake of fairness, now seems a good time to narrow the hunt somewhat. While there have been a lot of posts here, from Doctor’s Notes to solving tutorials, this site is primarily about the puzzles. Somewhere in those 60 posts is what you need to find the “+1 puzzle” and possibly win a free book.

Regards, Dr. S.

PS: There will be no “Ask Dr. Sudoku” this week, but if you have any questions you would like answered in a future column, or past puzzles that have appeared here that were not covered that you would like some more insights on, this is the time to inquire. Going forward, I intend the “Asking” to be more active and cover just about anything (from puzzle that use baskets to NCAA tournament brackets). Solving/construction tutorials are interesting, but are not meant to be the only kind of topic.

When I originally was planning to launch the site, I had a 60+1 puzzle roll-out in mind. In this puzzle set, I would introduce many of my styles from the past, particularly sudoku, and also write a lot of styles I’m planning to publish in the future. All of those roll-out puzzles have now been released, even if I only have recorded solvers for the 60 announced puzzles and none so far for the +1. That “puzzle” is not at all hard to solve once you find it, but that’s the challenge!

I’d love to hear your feedback now that the full set is released on which were your favorite puzzle types or even your favorite puzzles, so I can consider how to focus going forward. Which type(s) that did not occur would you like to see in the future? The Art of Puzzles will feature challenges in five general genres: Number Placement (TomTom and Skyscrapers), Object Placement (Battleships and Star Battle), Shading (Nurikabe and Tapa), Region Division (Fillomino and Cave), and Loop (Masyu and Slitherlink). And — while this is commercially risky in many people’s minds — it will have no Sudoku puzzles at all. So over the coming weeks, there will be fewer (but not zero) sudoku puzzles on this site as the puzzle styles in The Art of Puzzles get even more focus. And there may finally be a few variations on puzzles, but I won’t be publishing variations until the sequel!

I’ve gotten some questions about how I can keep up with posting so many puzzles every week. Well, I plan to take a little time off now. I have not written any puzzles for this week. But I hope you still visit to solve the puzzles that are here that you might not yet have completed — or found — and anything else that might pop up too. This is the end of the beginning, but the next chapter will be even more incredible.

I wanted to start this week by reintroducing this site for readers who may be visiting for the first time after reading a TIME magazine feature on the US Puzzle Team this week. Grandmaster Puzzles is the home to a range of logic puzzle types that may be familiar to you or completely new. I recommended that you start with the familiar, like Sudoku, and then move onto the new; every puzzle has a link to some rules and history that should help you get started. The puzzles get harder throughout the week so starting with the Monday/Tuesday tagged puzzles is a good way to sample the site too.

This is the last week in my 10-week “introduction” phase as I showcase puzzles in the last remaining style for The Art of Puzzles (Fillomino) and also bring you another view of sudoku from my past. While I intended this week to be the end of the first contest period at Grandmaster Puzzles too, with the indicated number of entries each getting a signed copy of one of our books (some spots remain), I am considering leaving the contest open until even more submissions have come in.

As we reach the end of the beginning, maybe it is time to reminisce a bit. Grandmaster Puzzles was a dream born in 2007 at the 2nd World Sudoku Championship to have a domestic source of quality logic puzzles. US magazines then primarily used, as today, computer-generated puzzles and mostly seemed to know that sudoku exists but nothing else. I knew something better could be made, and I suspected there were puzzle authors out there hungry for a place to submit their creations instead of just putting them up for free on the web. While it has taken some time to get off the ground, as other puzzle writing tasks and real-life have crowded out starting a puzzle publishing company, the pieces are clearly coming into place now. Having sampled some of the really excellent puzzle submissions I’ve been getting for The Art of Puzzles recently, I know that this dream will soon be accomplished. All that remains is to grow the audience of puzzle lovers aware of how amazing hand-crafted puzzles can be!

– Dr. S

So last week was a week at sea for the solvers with Battleships and Battleship Sudoku. It was also my first week at SEA(ttle). And while it already feels like home I have a lot of apartment set-up to do still, and a growing pile of work as I take time to buy and build furniture.

My most observant solvers may have noticed I’ve been following particular genres in YRBGW order so far with my puzzle styles. If you don’t know what I mean, search the website a bit more. But I hate being predictable. I wrote a championship “Trophy” sudoku puzzle once with a first row ?2345678?. My occasional partner in puzzle-solving crime, Wei-Hwa Huang, saw that pattern and thought it was as likely that I would do 923456781 in a competition as 123456789 just to be sneaky. This week, I’ve decided I’ll just flip a coin to determine what I’ll post of the remaining options so you can’t possibly know better than 50:50 what puzzle type is coming. Or maybe that last sentence is a lie. Or maybe every other sentence in this paragraph is a lie. In all honesty, there are no hidden puzzles in this paragraph. But there are two more puzzle styles to come this week: a familiar sudoku style from me and Wei-Hwa, and whichever of “heads” or “tails” wins the coin toss today.

This week I’m going to start hiding the solving times behind a spoiler tag. I don’t know how choosing to see these times before starting will affect your solving, but I’d welcome a discussion on how times, or “points” on a competitive test, change your solving style. Does this differ when you have hand-crafted puzzles with a particular time goal versus, say, a generated croco-puzzle with a particular time standard set from other solvers?

No real news this week. I’m moving away from San Francisco, so this week and next will be pretty brief Doctor’s Note-wise.

This coming week contains Tapa and Sudo-Kurve puzzles. As I’ve never posted a *classic* Tapa puzzle despite writing several, I needed to make a new example worthy for posting tomorrow on the Rules page. This example (about Wednesday difficulty) is a bonus puzzle for today, and there will be three more Tapa puzzles throughout the week.

PDF

or solve online (using our beta test of Penpa-Edit tools; use tab to shift between shading mode and the composite Yajilin mode where left click marks cells, right click marks dots in cells or X’s on edges, left click+drag draws lines.)

Theme: Quadrants

Rules: Shade some squares black to create a single connected wall. Numbers in a cell indicate the length of consecutive shaded blocks in the neighboring cells. If there is more than one number in a cell, then there must be at least one white (unshaded) cell between the black cell groups. Cells with numbers cannot be shaded, and the shaded cells cannot form a 2×2 square anywhere in the grid.

Answer String: Enter the length of shaded segments, from left to right, in each of the indicated rows. Separate each row’s entry from the next with a comma.

Time Standard: Tapa Grandmaster = 1:00, Master = 2:00, Expert = 4:00

Solution: PDF

We’re now halfway through what I’ve been calling the “introduction” phase of Grandmaster Puzzles, in which I introduce the majority of the genres I’ll be including in my next few books, both as author and as editor. After the “introduction” phase, there will be puzzles by some other talented puzzle constructors here. And I hope to have over half of the puzzles in The Art of Puzzles written by others, maybe even you. I’ll be sending a detailed contributor email out by the end of the week so if you haven’t contacted me yet with interest in writing puzzles for these projects, now is the time to do so.

After the discussion last week, I’ve decided to change my reported time standards a bit. First, “Grandmaster” will be introduced and will be equivalent to about where Master was set before, timed close to my best test-solver and equivalent to where I expect someone in the top 10 in the world to be. Master will now be set around the median of my group of solvers, which will be about where a 10th place USPC finisher will be or about top 100 in the world. In some sense these two times will inform on the mean and s.d. of the puzzle, and can highlight the Aha nature versus speed nature of particular solves as I have a few where one solver blazes through but the average solve takes much longer. Expert will be set at 2x the new Master time, which will often be close to the old 3x of GM but is hopefully more stable as it is using many more solvers’ data. There will no longer be a Novice time. It has not been a very useful measure at all, and I think has encouraged more disappointment than cheer from people trying to target it.

Next week will be “Think Outside the Box” week, with two puzzle styles where the clues are outside the grid. That should be a pretty easy Puzzle and Sudoku pair to identify, and I hope you enjoy the set of challenges I’ve lined up.

Best,
Dr. S.