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JenniferG

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Reply with quote  #1 
I keep seeing this pop up all the time.  And it has something to do with a red/black alternating deck right?

So what should I first read as an introduction to this principle, and then follow it up with what?  I'd like to read various publications on the topic in a sensible order, with assumption I know absolutely nothing about it. 

I could google it or youtube search it, but I rather it not be explained by some random stranger who doesn't credit nor perhaps teaches it right.


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Mike Powers

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Reply with quote  #2 
Max Maven taught a nice Gilbreath principle based trick in his lecture yesterday. He is quoted as saying of the GP - "It is a thing of terrifying beauty." 

I believe he is working on a book of effects using the GP. You can definitely achieve some miracle class magic using it.

Mike
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JenniferG

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Reply with quote  #3 
Oh Rudy has a Gilbreath Principle tutorial video.  Gonna watch it now.

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luigimar

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Reply with quote  #4 
And with some knowledge of the principle, you can read, learn and get further practice by reading about it from the creator himself...

https://www.penguinmagic.com/p/4457


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RayJ

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Reply with quote  #5 
Take some time to study the list in Conjuring Archive.  You might have some of the publications already, but if not, you can at least find references.  

https://www.conjuringarchive.com/list/search?keyword=gilbreath+principle
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RayJ

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Reply with quote  #6 
You know you've arrived when a Wiki page is dedicated to your creation!

https://en.wikipedia.org/wiki/Gilbreath_shuffle

Lots of interesting stuff in there.
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JenniferG

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Reply with quote  #7 
Quote:
Originally Posted by RayJ
Take some time to study the list in Conjuring Archive.  You might have some of the publications already, but if not, you can at least find references.  

https://www.conjuringarchive.com/list/search?keyword=gilbreath+principle


Thanks, I need to get used to using that web site!  Keep forgetting about it for some reason! 
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Mbreggar

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Reply with quote  #8 

Jennifer, there are several constructs called ‘Gilbreath Principles’. I read an article somewhere that there are at least three principles, there may be more. There are only two that make sense to me.
One involves the alternating colors bit you mentioned. The other, which I have used many, many times, allows you to retain certain cards in a packet after a legitimate (riffle) shuffle. It goes something like this in its rawest form:

Take half a deck and on top place the cards ace through 10, any suit, ace on top of the face down pile. On the other half place another grouping of ace through 10, but the 10 is the top card and the ace is the 10th one down. Give the two halves one legit riffle shuffle. No more shuffles and no cuts. Now deal10 cards from the top of the the deck. Even though you have shuffled the cards, you will always end up with one card from ace through 10. 

This may not seem like anything more than a curiosity...but wrapped in a routine, it has great power!  This is the Gilbreath Principle Rudy used in his demo.

it is not something that is used as a trick itself, nor should it be. Rather, it is a tool that adds a layer of deception to an effect.

Nick Trost had used versions of this principle dozens of times in his wonderful books. Harry Lorayne has taken advantage o f it’s properties  as well. There are three magic principles in play in my trick “Influence-Enza” (which Rudy performs elsewhere in the Forum), one of them is a variation of the Gilbreath.

if you are into creating your own effects, this is definitely something to learn. 

 

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Matt G

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Reply with quote  #9 
John Carey's Stealth is the first effect I learned utilizing the Gilbreath Principle. It's still a favorite opener of mine.
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Mbreggar

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Reply with quote  #10 
Those of you inclined to learn the math behind the GP could take a look at “Magical Mathematics” by Persi Diaconis. Also, mathematician Colm Mulcahy has done some great work with this in his book “Mathematical Magic”

Also check out the wonderfully magical and amazing work by Marty Kane. Marty has a real knack in hiding these cool mathematical principles so the end result appears to be nothing short of magical!
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Gareth

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Reply with quote  #11 
Quote:
Originally Posted by Mbreggar
Those of you inclined to learn the math behind the GP could take a look at “Magical Mathematics” by Persi Diaconis. Also, mathematician Colm Mulcahy has done some great work with this in his book “Mathematical Magic”

Also check out the wonderfully magical and amazing work by Marty Kane. Marty has a real knack in hiding these cool mathematical principles so the end result appears to be nothing short of magical!


Colm Mulcahy material is brilliant.
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JenniferG

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Reply with quote  #12 
Quote:
Originally Posted by Mbreggar

Take half a deck and on top place the cards ace through 10, any suit, ace on top of the face down pile. On the other half place another grouping of ace through 10, but the 10 is the top card and the ace is the 10th one down. Give the two halves one legit riffle shuffle. No more shuffles and no cuts. Now deal10 cards from the top of the the deck. Even though you have shuffled the cards, you will always end up with one card from ace  


I just tried this.. love it!
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Gareth

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Reply with quote  #13 
David Williamson’s ‘The One Who Spelt It Dealt It’ is another Gilbreath cracker.
Little name drop - Rudy and I met Norman Gilbreath at the Castle Library last July and then watched him absolutely smoke an audience of magicians. Completely remarkable. A real gent.
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Mbreggar

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Reply with quote  #14 
Quote:

I just tried this.. love it!


Check out Nick Trost's work on the GP. He has a Gilbreath chapter in most of his "Subtle Card Creations" book. 

Also, Harry has a great GP trick in Trend Setterswhere the magician keeps dealing five-card straights from a shuffled deck (can't remember the name of the trick though). Richard Vollmar and Ramon Rioboo has done some fabulous work with GP as well.
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arthur stead

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Reply with quote  #15 

I devised a Gospel routine, based on a Max Maven effect, which combined a Karl Fulves idea with the Gilbreath Principle.  It plays beautifully! 

And as Mike Breggar explained above, the Principle is used primarily to add a layer of deception. 


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kevlingo

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Reply with quote  #16 
Hey Jennifer, I know I'm late on this post, but I know you are a mem deck worker. In its simplest form, the GP can be used with anything that has 2 distinct values, like red/black. There can be some interesting applications in mem deck work because we have stack numbers, which have odd/even values.

Matt Baker has an awesome application of the GP in the Buena Vista Shuffle Club. In addition, there is a fantastic book written by Mat Parrott called "Breath" that has all kinds of applications for it.

Kevin
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JenniferG

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Reply with quote  #17 
That's so cool that you joined the forum Kevin! I see ya joined yesterday.  Did you hear about the forum in the Memdeck Workers FB group?

I really appreciate your informative posts! I didn't think about the Gilbreath principle with respect to odd/even locations of cards in memdeck.. AWESOME!  You are so full of knowledge regarding memdeck and more!  I look forward to all your variations of all these great routines as well.

Welcome to the forum!  So many great magicians here!  Everyone is really cool in this forum, nice and have helped me out tremendously.
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kevlingo

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Reply with quote  #18 
Quote:
Originally Posted by JenniferG
That's so cool that you joined the forum Kevin! I see ya joined yesterday.  Did you hear about the forum in the Memdeck Workers FB group?


I actually stumbled on it searching Google for something. I'm really glad I found it too! I lurk at the Cafe. There's some great people there but there is so much trolling and flame wars that I just keep my to myself 😉

Kevin
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