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 Forum index » Diversions » Perplex City Puzzle Cards » PXC: Silver Puzzle Cards
[Puzzle] #243 Silver - Shuffled Part 2 (Read 1st Post!)
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arnezami
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Joined: 14 Apr 2006
Posts: 136

Back to basics:

I'm trying to go back to basics here. This is what my most basic approach would look like.


The whispered hint is clearly vital. My most intuitive way of translating the phrase:

Quote:
If entropy wins, outward looks should leave you cold


would be:

Quote:
First shuffle the cards, then when decrypting ignore the outer disappearing letters


If this is true the "only" thing we have to do is to shuffle the deck. I believe the most basic form of shuffling is the riffle shuffle. Here is a quote from this website.

Quote:
The riffle shuffle is the traditional method of shuffling.
...

One riffle shuffle reorders the cards significantly. But the reordering is not random, by any means. The top card is still near the top. The bottom card is still near the bottom. Most pairs of cards are either still adjacent to each other, or not very far apart. And so, several shuffles are necessary. How many shuffles? Mathematics shows that at least seven shuffles are needed to randomize the cards. More shuffles than that do not affect the randomness.

...

A perfect shuffle occurs when the deck is divided exactly in half, and the cards are perfectly interlaced, with one card coming from one hand, then one card coming from the other hand, then one card coming from the first hand, etc. There are two types of perfect shuffles, the "in-shuffle" and the "out-shuffle."


So it seems we might simply have to do several perfect shuffles (random riffle shuffles would make no sense). The mentioning of "seven" is interesting because we might also have found this number in the dissapearing text (by kian). That hint says: "Shuffled Fourth Prime" or "Shuffled x Fourth Prime". Shuffling seven times would thus make sense.

There are two ways of perfect shuffles. Inner and outer. So trying out all 128 combinations of 7 inner and outer perfect shuffles might reveal the answer (btw there are 128 letters on the card which might also be a hint to 2^7 = 128). But I'm not sure if all 128 have been tried yet! Wink

I think this would be the most basic approach of solving this card (and it makes use of all hints on the card).

Has anybody tried this? Or should it still be tried out?

arnezami

PostPosted: Sat Jun 10, 2006 4:02 am
Last edited by arnezami on Sat Jun 10, 2006 7:30 am; edited 5 times in total
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miamo_tutti
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Joined: 06 Apr 2006
Posts: 50
Location: Colorado Springs, CO

This is more or less my thought process on the card from the first day I started working on it.

One of the first things I did was order the cards in the way they come out of a Motor deck and perform several perfect shuffles, each time looking for some particular arrangement of the three "outward-looking" face cards. All I got from perfect shuffles though was a bunch of peculiar ordering patterns that would seem to indicate the opposite of playing card entropy.

Later I wondered whether it was faulty to assume that "outward looks" were the three one-eyed face cards. A case could be made that every card but the one-eyed face cards is outward looking, or that every face card contains an outward look.

Still later I started having trouble believing that solving this card requires you to know the out-of-the-pack order of Motor playing cards. From then on I went with the bridge ordering that seems more tied to the solitaire cipher.

Then came a bunch of ideas for passphrases that got me nowhere in decrypting anything.

Recently I've tried inserting the ten disappering letters in the 10 spaces between the regular cipher text on each row, but it hasn't turned up anything. Also I'm wrestling more with the hot-and-cold theme of the card. When I got the card the 20 letters at the beginning and end of the cipher text were visible, then I applied heat and they disappeared and pretty much stayed that way until I stuck the card in my freezer and they reappeared. So I'm wondering if we should be thinking of the letters more as appearing in cold rather than disappearing in heat. Or both.

So there you are, portrait of a Shuffled failure. Avoiding overcomplication worked with Mother Tongue, but here, who knows? My problem continues to be the abundance of information here that needs to be harmonized to reach the answer. The mysterious clue that could mean any number of things, the heat/cold disappearing/reappearing letters, the other 108 letters, etc. Any method I try to attack this thing with always seems to be ignoring something.

PostPosted: Sat Jun 10, 2006 7:18 am
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arnezami
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Joined: 14 Apr 2006
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Ok. I've just tried out all 128 combinations of 7 inner and outer perfect shuffles. Sadly they all seem to produce random plaintext. No luck. Sad

I've also tried doing less than 7 shuffles. So in total (128+64+32+16+8+4+2+1=) 255 combinatons. No luck.

I've checked all "by hand" so I might have overlooked it though. Rolling Eyes

I've attached the text file containing all decrypted messages using 0-7 shuffles with all combinations of inner and outer perfect shuffles. The used inner/outer shuffles are represented by 0's and 1's and the deck ordering (after shuffling) is also included for each combination. Please check a few to see if I have made a mistake.

Its also possible the resulting plaintext is encoded with a simple ROT (or some other simple coding). So you could use this textfile for statistical analysis if you like.

arnezami
all_perfect_shuffles.zip
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PostPosted: Sat Jun 10, 2006 8:42 am
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Bendover
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Location: San Jose

To go even more basic,Do you think MC is devious enough to put all the elements of a Solitaire Cipher in front of us and let us hang ourselves trying to solve as per Solitaire and it really be a simple kind of cipher? We have been burned on these silvers a lot lately. Drool

PostPosted: Sat Jun 10, 2006 4:33 pm
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miamo_tutti
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Joined: 06 Apr 2006
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Location: Colorado Springs, CO

Bendover wrote:
Do you think MC is devious enough to put all the elements of a Solitaire Cipher in front of us and let us hang ourselves trying to solve as per Solitaire and it really be a simple kind of cipher?


At that point, devious would end and cruel would begin.

PostPosted: Sat Jun 10, 2006 6:25 pm
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e_nygma
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Joined: 17 May 2006
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Location: Maryland, US

Bendover wrote:
To go even more basic,Do you think MC is devious enough to put all the elements of a Solitaire Cipher in front of us and let us hang ourselves trying to solve as per Solitaire and it really be a simple kind of cipher? We have been burned on these silvers a lot lately. Drool


Well ... they could have done that. However, recall, we've been burned on wave 3 silvers, and this one is left over from wave 1. I'm not sure they'd be that cold at the beginning before they had most of us hooked.

PostPosted: Sat Jun 10, 2006 8:42 pm
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Stratman
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Joined: 03 Feb 2006
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Location: Kettering UK

Ive been quiet for a while. but still been following the thread and still struggling with this card, but getting nowhere - nothing worth a post anyway.
One thing bugging me...the if entropy phrase and Von's clue both seem to relate to the disappearing text...as if Mind Candy didnt think we would notice it easily. Well on my first wave Shuffled the letters are clearly visible at room temperature (even on a hot day) and disappear easily with heat from a finger behind the card. I noticed it within seconds of having the card. That means they used up two major clues on something so obvious?. Perhaps it was yet another mistake and the change should have been less obvious...ie the letters should disappear at a higher temperature.
Can anyone with a Wave 3 Shuffled confirm that the letters disappear with just a touch of a finger at the back of the card? If it was wrong in Wave 1, presumably they will have fixed it by now.
I would just like to know.
Thanks
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PostPosted: Sun Jun 11, 2006 4:18 am
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miamo_tutti
Boot

Joined: 06 Apr 2006
Posts: 50
Location: Colorado Springs, CO

Stratman wrote:
Can anyone with a Wave 3 Shuffled confirm that the letters disappear with just a touch of a finger at the back of the card? If it was wrong in Wave 1, presumably they will have fixed it by now.


My card is eBay-gotten, but it doesn't have the "Limited Edition Wave 0.5" marking, and the letters seem a lot less sensitive. Once I applied heat, though, they didn't really come back until I stuck the card in the freezer, and then they disappeared again. When we flicked the AC on for summer, the letters reappeared at room temperature, but still nothing from my finger. Go figure.

Von's hint must be doing something more than tipping us off to the heat-sensitive parts of the card. If I'm feeling cold I'm overly sensitive? So it's not cold, then, but still I may be feeling cold? To me there's more at work there than just "You should apply heat to first and last 10 letters and see what that does."

There's still so much here that isn't snapping. I'm convinced we're missing something, but I'm reluctant to grasp at straws. Not sure the card gives you much of a choice though.

PostPosted: Sun Jun 11, 2006 4:33 am
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jbd
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Joined: 27 Jul 2004
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Possible trout, but I haven't seen this while poking around the thread.

I interpret the 'entropy' quote as starting from the 'center' from the text and working outward. Entropy as expanding universe, that is, and you 'start hot' (the very center) and 'end cold' (where the letters disappear).

This would also explain why the missing letters are at both ends rather than at one end -- we aren't trying to read the letters in order.

So text we would be working with would start MRVXUIFHIGGU... and the point where the letters disappear marks where the coded message starts.

EDIT: I should also add this would explain the lack of X padding -- it would foul up the text since you aren't reading in order.

PostPosted: Sun Jun 11, 2006 9:32 pm
Last edited by jbd on Sun Jun 11, 2006 9:44 pm; edited 1 time in total
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jbd
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Joined: 27 Jul 2004
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Just for reference, here's what it is like if you read it from the inside outward:
MRVXUIFHIGGUORIABGJXYHGNNQYHYRTSOXJALWYJWUKFTJETYAWMH
SFMLMJOPSHMTVIBLAFAZKEPWGYVQVCWXXLOBVIMFYGKHZCPMLBLBU

With the disappearing text at the end:
WLHFT HUURR XGFIMF DUOLEP

PostPosted: Sun Jun 11, 2006 9:40 pm
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noobie
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anagrams

Some more anagrams of the disappearing text:

XHUFFLED FORUM UPRIGHT (kinda ironic)
XHUFFLED FROM PUG THRU I

these probably dont mean anything since its XHUFFLED and not SHUFFLED
but i thought i might still post

FIFTH MURDER OF PUGH LUX (know any Pugh lux)

I use http://wordsmith.org/anagram/advanced.html to get the anagram's it is the best one i have found so far. Please post if you know of one that can handle more letters

PostPosted: Mon Jun 12, 2006 11:18 am
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manleym
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Joined: 26 Dec 2005
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Location: Norwich UK

jbd wrote:
Just for reference, here's what it is like if you read it from the inside outward:
MRVXUIFHIGGUORIABGJXYHGNNQYHYRTSOXJALWYJWUKFTJETYAWMH
SFMLMJOPSHMTVIBLAFAZKEPWGYVQVCWXXLOBVIMFYGKHZCPMLBLBU

With the disappearing text at the end:
WLHFT HUURR XGFIMF DUOLEP


like the idea, i was also thinking along similar lines the other week
(Looking back in my book it was 4 days ago Smile

I also had another idea the same day which involved splitting the LUL at the end and putting 1 at the start of the text 1 in the middle and one at the end after i had went and typed the text outwards here is what i cam up with:
LUGHIXRMVUFIGOIBJYGNYYTOJLYWHFLJPHTILFZEWYQCXLBIFHGCMBBWULPZKYMVOXWVVGPKAABVMSOMMSMATJFUJWAXSRHQNHXGARL

Im now working on another idea from earlier notes.
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PostPosted: Mon Jun 12, 2006 1:01 pm
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Sh1ft
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Joined: 12 Nov 2003
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Location: Salt Lake City, Utah

manleym wrote:

I also had another idea the same day which involved splitting the LUL at the end and putting 1 at the start of the text 1 in the middle and one at the end after i had went and typed the text outwards here is what i cam up with:
LUGHIXRMVUFIGOIBJYGNYYTOJLYWHFLJPHTILFZEWYQCXLBIFHGCMBBWULPZKYMVOXWVVGPKAABVMSOMMSMATJFUJWAXSRHQNHXGARL

Im now working on another idea from earlier notes.


This is only 104 characters, shouldn't it be 108?

PostPosted: Mon Jun 12, 2006 3:04 pm
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Lilian
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Joined: 08 Jan 2006
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Location: Derbyshire

HELP Exclamation cos i'm a beginner at this crypto lark i need to ask the question if you get the right passkey would it generate the message right away or would i have to keep shuffling till it came up Question
*edit* also are we keeping the outer letters in or out of the equation
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PostPosted: Mon Jun 12, 2006 4:22 pm
Last edited by Lilian on Mon Jun 12, 2006 4:34 pm; edited 2 times in total
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manleym
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Sh1ft wrote:

LUGHIXRMVUFIGOIBJYGNYYTOJLYWHFLJPHTILFZEWYQCXLBIFHGCMBBWULPZKYMVOXWVVGPKAABVMSOMMSMATJFUJWAXSRHQNHXGARL

This is only 104 characters, shouldn't it be 108?

Whoops my mistake, my brian has been melted today,

here it is corrected with an updated way of thinking

LUGHIXRMVUFIGOIBJYGNYYTOJLYTOJLYWHFLJPHTILFZEWYQCXLBIFUGHCMBBWRAGXHNQHRSXAWJUFJTAMSMMOSMVBAAKPGVVWXOVMYKZPLL
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A Bolt here, a screw there, Ahh my Cube detector is nearly finished Mwah ha ha Twisted Evil Twisted Evil
The Most Beautiful Girl In The World
http://www.manleym.co.uk/shop


PostPosted: Mon Jun 12, 2006 4:23 pm
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