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 MobileRead Forums > iRex Get a quick Sudoku fix on the iRex iLiad

 10-16-2006, 05:39 AM #1 Alexander Turcic Fully Converged     Posts: 18,007 Karma: 12389154 Join Date: Oct 2002 Location: Switzerland Device: Sony PRS-650 / Nexus 7 / Kindle PW Get a quick Sudoku fix on the iRex iLiad In a world that has gone sudokuing mad, it doesn't come as a surprise that puzzle enthusiasts turn latest gadgets into platforms for ancient games. Thanks to MobileReader yokos who created 666 Sudoku puzzles of three different difficulties for the iRex iLiad. So, dear iLiad fans, it's time to sharpen your pencils... uhm, styluses! How to play: Fill in the grid so that every row, every column and every 3x3 box contains the digits 1-9. There's no maths involved. You solve the puzzle with reasoning and logic.
10-16-2006, 05:43 AM   #2
tribble

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 Originally Posted by Alexander Turcic There's no maths involved. You solve the puzzle with reasoning and logic.
Which actually is all math

 10-16-2006, 05:46 AM #3 doctorow Guru     Posts: 914 Karma: 3410461 Join Date: May 2004 Device: Kindle Touch One implies the other - but it's not necessarily the way around.
 10-16-2006, 05:53 AM #4 yokos Pac-Man catched my iLiad.     Posts: 720 Karma: 2571 Join Date: Apr 2006 Location: Germany; next to Baltic Sea Device: 1st gen iRex iLiad with 2nd ed. battery/case Easy explanation: It's not math in non-academic understanding because you are not calculating to solve it. Last edited by yokos; 10-16-2006 at 05:57 AM.
 10-16-2006, 06:08 AM #5 pdam Groupie   Posts: 199 Karma: 100 Join Date: Aug 2006 Device: iLiad, iPaq, Psion5&7, Blackberry It may be simple maths, but unless you're entering random numbers you'll still be doing some adding up, which still counts
 10-16-2006, 06:38 AM #6 tribble iLiad Maniac     Posts: 1,382 Karma: 2369 Join Date: Apr 2006 Location: Germany Device: Bookeen Opus (i love that thing) and iPad (what an irony) Darn, i didnt want to cause so much confusion. Just a little explanation. reasoning and logic are the basic principles of math. Calculation, is only a logic "framework", so you are basically using math every day and drrow, what do you mean? math => reason and logic but but not necessarily reason => logic => math ?? that might be true with alot of people.
 10-16-2006, 06:50 AM #7 Bob Russell Recovering Gadget Addict     Posts: 5,383 Karma: 590871 Join Date: May 2004 Location: Pittsburgh, PA Device: Note3/DVP11 How about this?... No advanced math needed, just simple arithmetic with integers. ;-)
 10-16-2006, 07:06 AM #8 Devlar Enthusiast   Posts: 39 Karma: 397 Join Date: Jul 2006 Device: Kobo Aura H20 I'm not totally certain, but I'm wondering if a similar program exists for generating chess problems as does for the Sudoku puzzles?
10-16-2006, 07:36 AM   #9
arivero
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On the contrary, it is advanced math what is implied in this kind of highly symmetric objects. Kind of Rubick's cube being about group theory. But you do not need to use it to understand the examples.

 10-16-2006, 07:52 AM #10 doctorow Guru     Posts: 914 Karma: 3410461 Join Date: May 2004 Device: Kindle Touch The origins of Sudoku lie with the mathematician Euler who devised something nasty called Latin Squares. http://mathworld.wolfram.com/LatinSquare.html
10-16-2006, 08:05 AM   #11
tribble

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 Originally Posted by Devlar I'm not totally certain, but I'm wondering if a similar program exists for generating chess problems as does for the Sudoku puzzles?
hehe, ok, now we are getting into it
Actually, those two games can not be compared.

Usually sudoku games are created to have only one possible solution. You could design them to be more difficult with several solutions. But that would make it hard for the user, because he would come to a point in the game, where he has to "guess" a number for a field. I have yet to come across one of those. Until now i could solve every sudoku by just following plain logic without ever having more than one solution or even come across a dividing path while solving of which one would prove not solveable.

It is for that an "easy" problem and can easily be solved by a computer in milliseconds.

chess on the other hand is a multiplayer game, which offers a totally different level of difficulty. You simply can not calculate all possible moves and choose the best one there is in a reasonalbel amount of time. Thats why computers still loose against human beeings.
There is a whole reasearch field about game theory and multiplayer game theory.

Getting into that, that is high level logic, reasoning and calculation
Math at its best.

 10-16-2006, 08:43 AM #12 pdam Groupie   Posts: 199 Karma: 100 Join Date: Aug 2006 Device: iLiad, iPaq, Psion5&7, Blackberry It's either advanced or simple math depending on what strategy you approach the problem with, either way there is still maths involved
10-16-2006, 08:55 AM   #13
doctorow
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 Originally Posted by pdam It's either advanced or simple math depending on what strategy you approach the problem with, either way there is still maths involved
I'd be interested to hear more about the math-way of solving Sudoku puzzles. Until now, my way was more less counting and trial & error.

 10-16-2006, 09:18 AM #14 Bob Russell Recovering Gadget Addict     Posts: 5,383 Karma: 590871 Join Date: May 2004 Location: Pittsburgh, PA Device: Note3/DVP11 Oh, I see, Soduku doesn't even involve adding. I didn't realize that. I see why Alex said "no math!" But if you do want some math, it's apparently all about combinatorics and permutation group theory. Here's one place to start learning about Soduku math... http://en.wikipedia.org/wiki/Mathematics_of_Sudoku And this is a cute article: The mathematics of Sudoku, a puzzle that boasts "No math required!".
10-16-2006, 09:20 AM   #15
igorsk
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 Originally Posted by doctorow I'd be interested to hear more about the math-way of solving Sudoku puzzles. Until now, my way was more less counting and trial & error.
http://en.wikipedia.org/wiki/Mathematics_of_Sudoku