A Clued Sudoku Puzzle? It’s More Than Meets the Eye


The hunt is always on for the next big puzzle idea.

Sometimes, it’s an old idea that gets repackaged and catches fire. That’s what happened with Sudoku, a puzzle that had been around since the late ’70s, but only rose to prominence decades later.

Other times, it’s a combination of different puzzle types that yields something special. Our friends at Penny Dell Puzzles, for instance, have a popular puzzle called Anagram Magic Square, which combines crossword-style cluing, anagrams, and the mathematical element of a magic square to create an engaging puzzle experience you can solve from several angles.

Whether a puzzle is destined for superstardom or not depends on a lot of factors: difficulty, the type of solving it involves, how intuitive the solving is (i.e. needing a lengthy explanation vs. getting the gist of the puzzle from a glance), visual aesthetics, and more.

As a puzzler, it’s always exciting to try out a new puzzle. Wholly original ideas are rare, to be sure, but even a single twist on an old classic can be enjoyable if executed well.

Today, we’re taking a look at a puzzle that combines Sudoku with cryptic crosswords (aka British-style crosswords). It’s called Cluedoku, and it was created by cryptic constructor Charlie Methven, better known in solving circles as Chameleon, a contributor to British puzzle outlets like The Guardian.


[Just a sample of the puzzle. Check out the entire puzzle here.]

Like Sudoku, Cluedoku involves placing the digits 1 through 9 into each row, column, and 3×3 square in the grid. But unlike Sudoku, there are no set letters.

Instead, you have 81 clues, one for every cell in the grid, utilizing cryptic-style cluing to hint toward which of the nine numbers goes in a given cell.

Once you’ve unraveled a clue and placed a number in the grid, standard Sudoku rules apply: that number will only appear once in a row, column, or 3×3 square.

But that’s easier said than done. These clues run the gamut of slyly clever to almost baffling. Even when you consider that there are only nine possible answers for each clue, it’s still a challenge. (Plus, not all of the clues adhere to the standard cryptic cluing mechanic of having both a definition AND a wordplay clue included.)

That being said, you’ll find lots of traditional cryptic cluing tricks at play here.

Now, we’re going to be discussing specific clues and answers from this puzzle, so this is your spoiler warning.








Last chance to solve without spoilers!







Okay, here we go.

In terms of traditional cryptic cluing gimmickry, we see hidden words, anagrams, homophones, word reversals, and more.

In clue 6 — Axis revolves without beginning to accelerate — we revolve (aka reverse) axis to spell SIXA, and then drop the A (“without beginning to accelerate”) to spell SIX.

In clue 8 — Prime cut from sloth reeks — the answer hides in plain sight, as a prime number (three) reads out in sloTH REEks (and can be cut out of it).

In clue 22 — Scenes in X-Men Origins reveal how many claws Wolverine has! — the phrase “origins reveal” points towards the first letters of the words that precede it proving the answer, meaning that SIX is the number of claws Wolverine has (three on each hand).

There is a similar game in clue 67 — With only seconds remaining, Officer Columbo outwits crook — which has the second digits of “Officer Columbo outwits crook” spelling out FOUR.

In clue 27 — UFO demolished third of Parliament Square — the letter R (“third of Parliament”) gets mixed up with UFO to make FOUR, a square.


But other clues would be familiar to crossword solvers in America.

Clue 29 — Number of Romans in the New Testament? — is simple wordplay for 6, since Romans is the SIXth book. (Similarly, clue 62 — Number of lines taken by bar staff — is a reference to the FIVE lines that make up a staff in sheet music.)

Clue 34 — Top score in Scrabble — is a bit more devious, requiring you to know that T is worth 1 point, O is worth 1 point, and P is worth 3 points, making the correct answer FIVE.

Clue 48 — Man’s arms’ legs’ digit — feels like a clue you’d see at the Indie 500 or Lollapuzzoola, because it’s initially baffling, but then reveals itself as merely clever and challenging. You see, there are THREE legs on the coat of arms for the Isle of Man. But that’s concealed by the wordplay involving three different words that don’t mean what you’d think.

This mix of American and British-style clues made for a fun solve that mixed and mingled two worlds of cluing nicely.

I think my favorite clue was Clue 39 — 192+284 — because it was built like one of those magazine word puzzles, the ones where “rockcaughthardplace” means “caught between a rock and a hard place.” In this case, you have “2+2” literally in 1984. And for anyone familiar with George Orwell’s famous novel, 2+2 in 1984 equalled FIVE.

Although obviously Cluedoku isn’t really sustainable as a recurring puzzle — you’d burn out your anagrams and homophones pretty quickly, as Chameleon himself stated in an interview — it is an impressive marriage of two different puzzles that rarely interact otherwise.

But he did raise the possibility of another variation in the future:

If I did another Chameleon cluedoku, I think I’d use the seven colours of the rainbow plus black and white, as solvers could then colour in each square as they solved. How’s “Cry over Norwich’s core Canary”?

That sounds like a fun follow-up to an interesting puzzle.

What did you think of Cluedoku, fellow puzzlers and PuzzleNationers? Let us know in the comments below! We’d love to hear from you.

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A 5-Letter Word Related to Crossword Skills? Try “Music”

A few years ago, I wrote a post discussing the curious intersection of music and puzzles. It centered around several studies about the effects both listening to music and performing music can have on individuals taking tests or solving puzzles.

There were two intriguing takeaways from these studies:

  • Both adults and children perform better on tests, puzzles, and problem-solving exercises when music is involved (ex.: if they listen to music before or during the test).
  • Children who are given music lessons often achieve greater heights in other subjects, including math and sports.

But it didn’t occur to me until much later that the connection between music and crosswords in particular has been in evidence for quite some time.

There are two 7-time champions in the history of the American Crossword Puzzle Tournament: Dan Feyer and Jon Delfin. Think about that. Fourteen out of forty-one ACPT tournaments have been won by one of these men. Practically one out of every three!

And both of them have a musical background as pianists and music directors.

But they’re not the only ones. Constructor Patrick Blindauer, puzzler and actress Whitney Avalon, Lollapuzzoola co-founder Brian Cimmet, and even our own Director of Digital Games Fred Galpern are all musicians.

So what’s the connection between music and crossword puzzles?

No one can say for sure, but there are theories.

In the crossword documentary Wordplay (and quoted from the article linked below), former New York Times Public Editor Daniel Okrent mentioned why he felt that musicians and mathematicians were good fits as crossword solvers:

Their ability to assimilate a lot of coded information instantly. In other words, a piano player like John Delfin, the greatest crossword player of our time, he sits down and he sees three staffs of music and he can instantly play it. He’s taken all those notes and absorbs what they mean, instantaneously. If you have that kind of mind, and you add it to it a wide range of information, and you can spell, you’d be a really great crossword puzzler.

Crossword constructor and psychology professor Arthur Schulman — known for a series of seminars entitled “The Mind of the Puzzler” at the University of Virginia — would agree with that statement. He posited a correlation between word puzzles, math, and music, in that they all involve a quick and intuitive understanding of symbols. It’s about “finding meaning in structure.”

In an interview with the New York Times, Dan Feyer built on this idea, stating that music, math, and puzzles all have pattern recognition in common, quickly recognizing combinations of blanks and spaces and mentally filling in possible answer words, even before reading the clues.

Now, clearly, musical skill and proficiency isn’t required to be a good crossword solver — I’d classify myself as a pretty good solver and I have an almost magical lack of musical talent — but it’s intriguing to ponder how puzzling could easily be wrapped up with a musical bow.

Do you know any other puzzlers with a musical background, or are you a lyrical solver yourself? Let us know in the comments section below! We’d love to hear from you!

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Farewell, David.

The puzzle world is a relatively small one, and sadly, over the last month or so, it has grown a bit smaller.

I know some of you are already aware of the passing of Raymond Smullyan, the mathematician and puzzlesmith who popularized, among other things, the logic puzzle known as “The Lady or the Tiger?”

What you may not know is that a long-time member of the Penny Dell Puzzles family also passed recently.


A Yale-educated lawyer, David Lindsey was a fixture at Penny Press for decades, but his influence on the world of puzzles extends back years before he joined that company.

The earliest editing credit I’ve been able to track down is a 1967 edition of Webster’s Crosswords, published by Merit, which is also one of the few publications where I’ve seen him credited under his real name. So, if you’ve ever enjoyed a puzzle credited to Dee Stewart or George Spelvin (a famous pseudonym from the American theater), you have David to thank for it.

Penny Press president Peter Kanter associates David with puzzles as far back as the early 70s, though it’s unclear when exactly David began working for Penny Press on a part-time basis. (I suspect it would have been around the time the Merit brand was acquired by Penny Press.)


He signed on full-time in 1987, and served as a puzzle editor, though perhaps his greatest legacy was the role he played in establishing its acquisitions department, the route by which outside puzzle creators and constructors could have their work featured in Penny Press magazines. David set quality standards for the puzzles that would be accepted, and served as the gatekeeper for all sorts of new puzzles.

He is also credited with creating or popularizing puzzles that are synonymous with Penny Dell Puzzles to this day. Secret Word, Chess Words, Chess Solitaire, Weaver Words, Diagramless Fill-In, Word Games Puzzles, and more flourished under his watchful eye and exacting attention to detail.

He would work the entire editing process, from concept to the final tweaks. At one point, David introduced a new type of puzzle in every issue of Variety Puzzles and Games, a Herculean feat.

His “Lindsey Lessons” — meetings where he would introduce and explain the nuances of puzzles — were invaluable to fellow editors, taking challenging puzzles like Word Math and making them more accessible, stripping away the mysteries that might have made them daunting to those who were unfamiliar with that sort of puzzling.

He even participated in a potluck-style puzzle group outside the office that would create and workshop new puzzle ideas together.


[A photo from David’s 80th birthday celebration.]

But when I asked people about David, it wasn’t his work in puzzles that left a lasting influence on them. It was his strong sense of self, a quiet confidence that he was who he was, uncompromisingly. He was at home with his choices, his quirks, and his beliefs.

There were stories about the injured coyote he cared for, stories about him jogging shirtless in winter, and stories about the snacks he brought into the office, the fruits of his many experiments with the food dehydrator given to him by members of a cardiac rehab exercise class he conducted.

David said, “I never eat sugar”, but curiously enough, he was always first in line when cookies or cakes were about.

He was never without one of his signature bowties, and he actually taught Peter Kanter how to tie one. (To this day, Kanter still uses the instructions David gave him, on the rare occasion he has to tie a bowtie.)

He was a pillar of his community, singing in a men’s chorus, participating in Daffodil Days events for the American Cancer Society, contributing recordings to some of the first Reading for the Blind programs, and even doing the Penguin Plunge well into his 80s to raise money for the Special Olympics.

It was my privilege to work with David for over a decade, and I’ll miss him very much. And I know that I’m far from the only one who feels that way.

Farewell, David.

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You can also share your pictures with us on Instagram, friend us on Facebook, check us out on TwitterPinterest, and Tumblr, and explore the always-expanding library of PuzzleNation apps and games on our website!