Those Sudoku Puzzles Can Be Criminally Tough!

Even when I’m not thinking about puzzles or intending to learn about puzzles, puzzles find me.

I was reading one of the most recent editions of Ripley’s Believe It or Not!, those delightful compendiums of all things amazing, weird, and unlikely. Everything from world records and peculiar habits to once-in-a-lifetime events and mind-bending coincidences are found between the covers of these collections.

And one particular fact caught my eye:

Eighty-six prisoners at Exeter Jail in Devon, England, signed a formal letter of complaint claiming that a Sudoku puzzle in the local newspaper — the Exeter Express and Echo — on May 21, 2015, was impossible to solve.

I was instantly intrigued.

[Image courtesy of The Telegraph.]

Here is the message the prisoners sent to the editor of The Exeter Express and Echo:

Dear Sir/Madam, I am sadly writing this letter in A LOT of disappointment.

As you will see, I’ve enclosed last week’s Sudoko [sic] page and we (along with 84 other prisoners) believe you printed a ‘hard’ Sudoku which is IMPOSSIBLE to complete.

As being prisoners we are only aloud [sic] access to Thursday’s issue, so we couldn’t verify the truth.

Yours FAITHFULLY,

Michael Blatchford
Shane Smith

Yes, The Exeter Express and Echo is printed twice a week, and since the answers to Thursday’s puzzles appear on Monday, and the inmates don’t have access to Monday’s issues, they were unable to check their own work.

So, naturally, I had to see whether this Sudoku puzzle was as unsolvable as the inmates claimed.

Finding a copy of the puzzle wasn’t hard. Here, I’ll post it here, in case you want to try your hand at it yourself:

[Image courtesy of The Telegraph.]

So, is it impossible?

Well, no.

In all honesty, I’m not the strongest or the fastest Sudoku solver. But I did complete this puzzle, difficult as it was. I suspect, given time, you would complete it as well. I don’t mean to impugn the Sudoku skills of the Exeter Jail population. I’m just saying.

As it turns out, the inmates had made a few key mistakes, mostly in the middle section, and since they apparently solve in ink, it made things much harder.

But, in a lovely response, the staff at The Exeter Express and Echo promised to make Monday papers available to the inmates as well, so they can double-check their answers next time. That’s nice.

And here’s hoping their Sudoku solving has been smooth sailing ever since. Apparently, it has been, since Ripley’s has yet to mention them a second time.


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A Puzzly Touch of Spring!

[Image courtesy of Atlas Obscura.]

It snowed over the weekend here on the East Coast, and after a disappointing prediction of six more weeks of winter from some of the more famous groundhogs around the world, you may find yourself longing for spring and all the marvelous greenery it promises.

In that spirit, I thought I would dedicate this February day to some mind-bogglingly lovely mazes that combine nature’s beauty with the ingenuity of humans.

[Image courtesy of Mental Floss.]

To start, feast your eyes upon the lavender labyrinth at Cherry Point Farm and Market in Shelby, Michigan, one of the oldest operating farms in Michigan.

The owner began designing the labyrinth in 2001, and it has since grown large enough to be seen on Google Earth! Finding your way to the center of the labyrinth should take about an hour, and attendance is free!

Be sure to visit in mid-July, when the French lavender is in full bloom, and enjoy the gorgeous scenery not far from Lake Michigan.

[Image courtesy of Atlas Obscura.]

Of course, if you’re looking for a bit more of a challenge when it comes to your homegrown mazes, the Longleat Hedge Maze in Wiltshire, England will pique your interest.

It’s the longest hedge maze in the world — but not the largest — and consists of more than a mile and a half of meandering paths, including dead ends.

[Image courtesy of Atlas Obscura.]

With six raised bridges and a tower from which to survey the entire maze, it’s one of the most striking labyrinths I’ve ever seen.

It’s actually one of several mazes on the property — others include the Lunar Labyrinth and the Sun Maze — but it’s by far the largest on the property. Although it only dates back to 1975 (while some mazes in England date back centuries), it’s truly a sight to behold.

[Image courtesy of Atlas Obscura.]

To close out our look at labyrinths around the world, we venture into the southern hemisphere to explore the Enchanted Maze Garden in Arthurs Seat, Australia.

Although it is the year-round home of “a traditional hedge maze with a Japanese Garden at its center, an ancient turf labyrinth, and a circular roomed maze for children,” it’s the constantly evolving Maize Maze that puts Arthurs Seat in the record books every year.

Each year, a new maze is designed, and with GPS assistance, over 100,000 stalks of corn are planted to create the Maize Maze. Sprawling across two and a half acres, the Maize Maze is open from mid-February through late April.

Hopefully these glimpses into the amazing depth and breadth of hedge and corn mazes around the world has you looking forward to springtime puzzling outdoors! Or, at the very least, not feeling so dreary about winter.


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A puzzly British Christmas card!

One government agency in England celebrates Christmas a little bit differently than most.

The GCHQ — Government Communications Headquarters — provides security and intelligence services for the British government. Back when they were known as GC&CS — Government Code and Cypher School — they were responsible for funding the Bletchley Park successes cracking the German “Enigma” code during World War II.

And for Christmas this year, they’ve released a puzzly Christmas card that’s sure to challenge even the staunchest puzzlers.

Step 1 of the puzzle is a logic art puzzle where you have to deduce where to place black squares on an open grid in order to form a picture.

Each column and row has a series of numbers in it. These numbers represent runs of black squares in a row, so a 1 means there’s one black square followed by a blank square on either side and a 7 means 7 black squares together with a blank square on either side.

Once you’ve solved this puzzle, you can use it to unlock the next puzzle in the chain.

From an article on GCHQ.gov.uk:

Once all stages have been unlocked and completed successfully, players are invited to submit their answer via a given GCHQ email address by 31 January 2016. The winner will then be drawn from all the successful entries and notified soon after.

Players are invited to make a donation to the National Society for the Prevention of Cruelty to Children, if they have enjoyed the puzzle.

This is one majorly challenging Christmas card. After you’ve conquered the logic art puzzle, you’ll confront brain teasers, palindromes, pattern-matching, deduction, number progressions, codebreaking, cryptic crossword-style cluing, and more.

I would highly recommend teaming up with another puzzle-minded friend (or more) and trying your luck. Let us know how far you get! (And you can hit up this article from the Telegraph for aid as well.)


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A puzzle hunt 100 years in the making!

Riddles, codebreaking, and scavenger hunts are three of my favorite puzzly topics. I’ve covered each extensively in blog posts previously, exploring not only the history and ever-changing nature of puzzles, but how deeply ingrained puzzle-solving is in our culture, past and present.

Tuesday’s post was about a fairly simple encoded puzzle I found lurking inside a short story. That simplicity, that accessibility is part of why I wrote about it.

For you see, fellow puzzlers, today’s post is not about a simple puzzle. Today’s post covers all three of the topics above — riddles, codebreaking, and scavenger hunts — in a sprawling, mindboggling story about a globe-spanning mystery that gamers and puzzlers joined forces to unravel.

It all started in April 2012 with the release of a video game called Trials Evolution, created by the game designers at Redlynx.

trials_evo_frontpage_large

Trials Evolution is a motorcycle racing game that incorporates real-world physics into the gameplay, challenging players to complete obstacle-filled courses as fast as possible.

Now, this might not seem like the type of game to conceal a fiendish riddle, but players were actually expecting a challenging puzzle to be hiding within the game, because Trials HD, a previous installment of the series, featured a riddle to solve that helped build the Trials gaming community.

So expectations were high for whatever riddle was lurking inside Trials Evolution. And it did not disappoint.

First, players had to locate a series of wooden planks throughout the game, planks that featured encrypted writing on them. Once assembled and decrypted, the planks featured instructions for a special maneuver for players to perform in the game while a particular piece of music played.

Successfully completing this task earned the player a bonus song, which included lyrics suggesting players transform the song into a visual form. Cagey players realized this meant running a spectral analysis on the song — a visual graph of sound or energy — which revealed a hidden message in Morse Code.

That message led to a website where the images below started appearing daily, one by one.

1293940361449154218

(It’s worth noting that these images started appearing in late 2013, more than a year after the game was released!)

Each image references a particular scientist. Once all twenty-six images were revealed, the indefatigable players had a visual alphabet to work with.

So when a message appeared using the images instead of letters, players cracked that code as well.

Still with me?

That code led to four sets of coordinates. Real world coordinates across the world! This riddle was only getting more complex the deeper players went!

globe_detailmap2

Something awaited intrepid players in San Francisco, California; Bath, England; Helsinki, Finland; and Sydney, Australia. In each location, players uncovered small chests, each containing a key and a metal plaque with the message “It seemed like forever ago” on it. (The Helsinki location also featured French documents, supposedly from 300 years ago, as well as an antique pocket watch.)

So, what do the keys open? What does it all mean?

Well, there was one last message. On the other side of the metal plaque included in each chest, there was a message:

Midday in Year 2113.
1st Sat in Aug
One of Five keys will open the box
Underneath the Eiffel Tower

That’s right. This riddle can only be unraveled nearly a century from now! This puzzle has gone from a hidden bonus feature in a video game to actual scavenger hunting in the real world, and is now becoming a multigenerational quest.

mauricemeyer

Take a moment and ponder that. It blows my mind to think about a puzzle that took dozens of people to conquer and will now become a story told to friends and sons and daughters as golden keys are passed down, all in the hopes of seeing what awaits us underneath the Eiffel Tower on a particular day in August in 2113.

And it all started with a motorcycle racing video game.

[For more details on the Trials Evolution riddle, check out this thorough write-up on Kotaku.]

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