It’s Follow-Up Friday: International Puzzle Day edition!

Welcome to Follow-Up Friday!

By this time, you know the drill. Follow-Up Friday is a chance for us to revisit the subjects of previous posts and bring the PuzzleNation audience up to speed on all things puzzly.

And today, I’d like to return to the subject of puzzly holidays!

[Let’s celebrate with some crossword cake!]

Today is International Puzzle Day (or National Puzzle Day, depending on who you ask), and we here at PuzzleNation couldn’t resist getting involved in the puzzly celebrations!

In fact, we went all out this year, building a puzzle fort from various puzzle magazines! Check it out!

puzzle fort

And that’s just for starters. We’ve also assembled a new rundown of all the terrific puzzle apps and games PuzzleNation has to offer!

From the iOS and Android versions of the Penny Dell Crossword App (including new puzzle collections for both!) to our Classic Sudoku, Classic Word Search, and Bible Word Search apps, you can get all the details on our library of apps right here!

And to cap off the day’s festivities, we’ve collaborated with our pal Darcy over at Penny Dell Puzzles to concoct a little puzzly quiz for you!

Click here to find out What Kind of Puzzle Am I?, complete with links to share your results across social media!


So how are you celebrating International Puzzle Day? Are you kicking back with your favorite app or puzzle book? Meeting with friends to do a bit of tabletop gaming? Or maybe tackling an Escape the Room event and testing your puzzle mettle! Let us know in the comments!

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View a Clue: Crossword Animals

Welcome to the third edition of PuzzleNation Blog’s newest feature: the View a Clue game!

I’ve selected ten animals that commonly show up in crossword grids — some have become crosswordese at this point — and I want to see if the PuzzleNation audience can identify them from pictures. It’s a visual puzzle I call View a Clue!

Without further ado, let’s give it a shot!


#1 (5 letters)

#2 (3 letters)

#3 (3 letters)

#4 (5 letters)

#5 (4 letters)

#6 (3 or 4 letters)

#7 (4 letters)

#8 (3 letters)

#9 (5 letters)

#10 (4 letters)


How many did you get? Let me know in the comments below! And if you have ideas for another View a Clue game, tell us below!

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A crossword contest!

Regular readers of the blog probably know the name George Barany. He’s a top-flight puzzle constructor and one of the masterminds behind the Barany and Friends puzzle group.

Last year, George launched the Enigma Variations puzzle contest, and this year, he’s got another terrific crossword contest for ambitious solvers! And he reached out to PuzzleNation Blog to help spread the word!

It’s called Eliminating the Competition, and it’s the brainchild of George, Ralph Bunker, John Child, Michael Hanko, and Roy Leban.

There are two levels of difficulty, the open division and the master division. The open division is classified as a mid-week New York Times difficulty level, while the master division is late-week difficulty.

And both puzzles have a meta puzzle hidden within that you’ll have to unravel to win the contest:

Contest (Open Division): Explain this puzzle’s theme, including its title. Specifically, explain the answers to the four indicated clues.

Contest (Master Division): Explain this puzzle’s theme, including its title, and any nuances you see. Bonus for Grandmaster level solvers: How was the “reveal” chosen?

Prizes include crossword books and subscriptions, as well as some prizes to be posted after the contest is over!

You’re welcome to try your luck against either puzzle! The contest ends Monday, February 8, at midnight, so the deadline is looming, but hey, that just adds a little drama to the proceedings, doesn’t it?

You can find the full details of the contest here. And good luck!


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It’s Follow-Up Friday: Rubik Rap edition!

Welcome to Follow-Up Friday!

By this time, you know the drill. Follow-Up Friday is a chance for us to revisit the subjects of previous posts and bring the PuzzleNation audience up to speed on all things puzzly.

And today, I’d like to return to the subject of Rubik’s Cubes!

I’ve written about Rubik’s Cubes plenty of times before, but today, I want to focus on learning how to conquer the cube.

There are numerous videos and how-to guides online that offer tips to improve your Rubik’s solving, but one video jumped out at me, because it taught you how to solve a Rubik’s Cube in song form.

Oh yes, there’s a Rubik’s Cube rap, courtesy of YouTube icon DeStorm:

Did his lyrical instructions help you finally unravel the mysteries of the Rubik’s Cube? Let me know in the comments!


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PuzzleNation Product Review: Schrodinger’s Cats

Even if you don’t know the science behind it, you’ve probably heard of Schrodinger’s cat at some point in your life. If you haven’t, let me give you the short short version: there’s a box with a cat in it, and a substance that may or may not release inside the box and kill the cat.

So until you open the box, there’s no way of knowing whether the cat is alive or not. Schrodinger posited that, since we can’t know which is the case, both are true until the box is opened. It’s essentially a thought experiment which delves far deeper into quantum mechanics and particle physics than I’m going to in this review.

But the idea that someone created a card game based on the concept of Schrodinger’s cat is not only audacious, but pretty impressive. (And the puns are just the icing on the cake.)

[Some of the cat physicists in the game: Sir Isaac Mewton,
Sally Prride, Madame Purrie, and Neil deGrasse Tabby.]

Schrodinger’s Cats was funded through a Kickstarter campaign last year, and it’s the brainchild of Heather Wilson, Heather O’Neill, and Chris O’Neill. A mix of bluffing, deduction, and wagering, this game combines Name That Tune-style bravado and strategy with Poker-style game play.

Each player is a cat scientist forming hypotheses on how many boxes contain live cats, dead cats, or nothing at all. (While Schrodinger is away, of course. As the old saying goes, when the scientist’s away, the cats will play. Or something like that.)

Every player receives one box card for each player in the game (so if there are three players in the game, each player receives three box cards), as well as one cat scientist card.

Once the cards are dealt, players look at their box cards and see what each box contains, hiding this info from the other players. Then the players begin hypothesizing. They wager on how many of each result are in ALL of the boxes on the board. So, in the game layout above, there are nine boxes, and each scientist has to wager what’s in all the boxes.

But instead of starting with a high guess and then wagering lower totals (as you would in Name That Tune), you start low in Schrodinger’s Cats and wager upward. Scientists can also affect the wagering by “showing findings” — revealing one or all of their own boxes to either prove their hypothesis or make the other players doubt their own — or by swapping out some boxes. (Each cat scientist card also allows for a one-time-use special action for a player, which can also prove useful.)

When a player either refuses to wager higher or challenges another player’s hypothesis by yelling “Prove it!”, all of the boxes are revealed and the hypothesis is proven or debunked (meaning the player stays in the game or leaves). After multiple experiments (rounds of play), one character remains and wins the game (and an honorary doctorate from Cat Tech University).

What I enjoyed most about this game (other than all the pseudo-scientific jargon involved in playing the game) was the wagering, bluffing, and reading of opponents that is integral to the game play. With so few possible cards to reveal (only four, in varying quantities, as opposed to 13 different cards across four suits in poker), it’s not nearly as challenging as the classic card game, but offers a lot of similar game mechanics.

It’s great fun to try to outwit or read your fellow players in order to make the best hypothesis, and that’s a sort of puzzling that is often left behind in puzzle games. Often, you’re so busy trying to achieve a certain goal or acquire points that you stop actively interacting with the other players; but in Schrodinger’s Cats, a lot of puzzling and game play takes place in the actions and reactions of the other players. It’s a delightfully social game.

Although you can play with as few players as two or as many as six, I recommend playing with at least four characters to keep the game moving and interesting. Between raising hypotheses, showing findings, and trying to puzzle out what your fellow players are hiding, the more uncertainty you can introduce to the game, the better.

Schrodinger’s Cats is available from 9th Level Games and can be found here.


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Pizza puzzling!

I ordered pizza the other night, and being a puzzly guy, I couldn’t help but find a puzzle hiding beneath the lid of that pizza box.

The pizza was cut into eight slices, as you’d expect, all of roughly equal size. And I started to wonder: what if you had more than eight people sharing one pizza?

The simple solution would be to cut those pieces down the middle into long, thin pieces. But were there other solutions out there, other shapes that would allow more people equal access to a shared pizza?

So I did a little research, and I stumbled upon this recent Gizmodo article, which discussed a mathematical paper titled “Infinite families of monohedral disk tilings.”

I don’t know about you, but I’m definitely going to start calling pizza slices “monohedral disk tilings.”

Anyway, mathematicians had apparently tackled the pizza problem before, and they believe the solution rests with tessellation, the use of the same shape or symmetrical shapes repeated over and over to fill a given space.

When you think about symmetry and tessellation, you tend to think of straight lines.

But the amazing thing about these solutions to the pizza problem? They all abandon straight lines.

As you can see, there are numerous variations that work from this shield patterning. Since the shields are the same, dividing the shields up into equal parts in different forms yields other solutions.

And that use of arcs (curved lines) instead of straight lines makes patterns that would normally only work in squares, pentagons, and other shapes work for circles, like your friendly neighborhood pizza.

But there are more solutions for the pizza problem lurking out there if you abandon the three-sided piece and try more exotic shapes. Check out these patterns:

Granted, the average pizza slicer isn’t going to be dicing up a pie into 28 or 36 pieces… but it’s nice to know there are options out there, in case a few dozen friends stop by unexpectedly on pizza night.


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