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Henry Sudoku

 
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Henry Sudoku - 11/22/2008 8:18:10 PM   
aman8888

 

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Hi, everybody!

Every month, I create an original sudoku puzzle for NRICH, a joint project between the Faculties of Mathematics and Education at The University of Cambridge.

My latest sudoku creation for this month (November 2008) is posted on http://nrich.maths.org/public/viewer.php?obj_id=6311
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RE: Henry Sudoku - 11/23/2008 1:03:09 PM   
gilg

 

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Thanks for the post Aman.
I see some very interesting online games at http://nrich.maths.org/public/search.php?search=All%20Games

_____________________________

~Gil~

(in reply to aman8888)
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RE: Henry Sudoku - 11/23/2008 5:28:32 PM   
aman8888

 

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Thanks for your encouragement.  It is obvious that NRICH knows that puzzles and interactive mathematical games allow students to learn and play at the same time.

NRICH begins to use innovative flash interactivity for my sudoku variant in November.

My first version of "LCM Sudoku", using numbers and unknown variables, was posted on http://nrich.maths.org/public/viewer.php?obj_id=6018

To be more specific, that variant should be called "Algebraic LCM Sudoku".

I have posted a more challenging version of "LCM Sudoku", which uses advanced sudoku techniques, this month (November 2008) on the site http://www.chinasudoku.com/

There you can also find another of my sudoku variant called "Story Sudoku" which is solved by means of a fairy tale.

(in reply to gilg)
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RE: Henry Sudoku - 11/26/2008 2:44:42 AM   
Cyclone

 

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Do you have some of your older puzzles for us?  I started this one, but I didn't have time for a strong go at it.  I'd like to try all of the variants on paper if possible.

Cyclone

(in reply to aman8888)
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RE: Henry Sudoku - 11/26/2008 12:23:58 PM   
aman8888

 

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Thanks for your interest in my sudoku creations.

You can find my stuff in the following links:

http://www.ageofpuzzles.com/Collections/PuzzleHits.htm

http://www.chinasudoku.com/

http://nrich.maths.org/public/search.php?search=sudoku

(in reply to Cyclone)
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RE: Henry Sudoku - 11/26/2008 12:42:48 PM   
gilg

 

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quote:

ORIGINAL: aman8888
You can find my stuff in the following links:
http://www.ageofpuzzles.com/Collections/PuzzleHits.htm


World is small, Aman... Serhiy Grabarchuk (of ageofpuzzles.com) is a colleague and a dear friend of Conceptis. Glad to see you two are cooporating. All the best.

_____________________________

~Gil~

(in reply to aman8888)
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RE: Henry Sudoku - 11/26/2008 1:09:50 PM   
aman8888

 

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Serhiy Grabarchuk is a good friend of mine.  I use to send him a Christmas card every year.  However, a look at the website gives me the impression that he is semi-retired and his son is taking a more active role in making puzzles.  Please send him my regards.

(in reply to gilg)
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RE: Henry Sudoku - 12/1/2008 9:48:38 AM   
aman8888

 

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My sudoku creation for the December 2008 NRICH http://nrich.maths.org/public/viewer.php?obj_id=6368 is named "Bochap Sudoku" which combines all four arithmetic operations to obtain the solution.

(in reply to aman8888)
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RE: Henry Sudoku - 1/2/2009 4:04:48 AM   
aman8888

 

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Happy New Year, gilg and other moderators!

My sudoku creation for this month (January 2009) is "Colour Islands Sudoku" in http://nrich.maths.org/public/viewer.php?obj_id=6405

The variant is based on part of the rules of my two board games.

(in reply to aman8888)
Post #: 9
RE: Henry Sudoku - 1/9/2009 1:40:38 AM   
grandpascorpion

 

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Hi Henry,

I just tried LCM II.  Very nice, deceptively tricky, too.

(in reply to aman8888)
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RE: Henry Sudoku - 1/23/2009 10:56:31 PM   
aman8888

 

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Thanks, grandpascorpion, for your kind words.

Back in 2006, only a few sudoku variants were invented as shown in http://www.maa.org/editorial/mathgames/mathgames_09_05_05.html

I can consider myself as one of the pioneers in the invention of sudoku variants outside Japan.  After creating sudoku variants for NRICH and other websites for 3 years, it is time to look back at what I have invented and achieved since 2006.

My first LCM Sudoku variant was invented in April 2008 as shown in http://nrich.maths.org/public/viewer.php?obj_id=6018

A more difficult version of LCM Sudoku was invented in November 2008 as shown in http://www.chinasudoku.com/

A popular sudoku variant invented by me in November 2006 is the Twin Corresponding Sudoku as shown in http://nrich.maths.org/public/viewer.php?obj_id=5477

I also designed it for the Second World Sudoku Championship 2007 at Prague.

(in reply to grandpascorpion)
Post #: 11
RE: Henry Sudoku - 1/25/2009 8:52:27 PM   
aman8888

 

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One of my friends just pointed out that he found a so-called "Substitution Twin Sudoku" on one website.  The puzzle is similar in every way to my "Twin Corresponding Sudoku" except for its name and its position in a vertical direction.  This "new" puzzle was published in 2008 while my puzzle was invented and first published in 2006.

I have to thank that person for liking my "Twin Corresponding Sudoku" so much that he changed its name entirely.  It won't be surprising that in the future I shall find other "fans" of mine playing similar jokes on me by pubishing my "Twin Corresponding Sudoku" under other names such as "Replacment Twin Sudoku", "Twin Replacement Sudoku", "Similar Twin Sudoku", "Twin Substitution Sudoku", etc.

(in reply to aman8888)
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RE: Henry Sudoku - 1/26/2009 12:10:18 AM   
grandpascorpion

 

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Well, there's so many people doing Sudoku variations.  It's entirely possible they independently came up with a similar idea.

I have a come up with ideas only to find that Nikoli beat me to it.

Have you come up with any other puzzles except these links you have listed?

(in reply to aman8888)
Post #: 13
RE: Henry Sudoku - 1/26/2009 6:39:21 PM   
aman8888

 

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Dear grandpascorpion, I agree with some of your words.  For instance, when I was a small boy, I accidentally stumbled upon the following interesting fact 5x5=(3x3)+(4x4) for a right-angled triangle with sides of 5cm, 4cm and 3cm.  Later when I went to secondary school, I discovered that interesting fact was an example of the so-called Pythagoras' Theorem.  How I wish I could be born before Pythagoras! 

However, it would be useless and even regarded a joke for anybody to make any claim of discovery and invention that had been announced by others.  In the world of invention and discovery, the English proverb "Great minds think alike" is true, but the real winner is the one who is the first to announce any discovery or invention to the world.  If anybody makes the same claim after the date of announcement of the invention or discovery, he would become a laughingstock and treated as a clown or joker.

From my three years of observation in the sudoku/puzzle world, I have come to the conclusion that it is better for a sudoku inventor just to be satisfied with a few or even one sudoku invention, and after that he should agressively defend his right of invention.  Whenever he finds somebody claims a similar invention after the date of announcement of his invention, he should remind the world that he has already announced the invention.  Whatever new inventions he has in mind, he had better not announced it to the world if he has no way to prevent it from being plagiarised by others.  If somebody manages to announce the same invention which he has kept secretly in his mind, then good luck to him !

I call this type of tactics "archaeologist's tactics".  If an archaeologist has to way to protect the relics, he had better stop digging here and there.  He should leave everything lying in the ground and never announce his new finding to the world, otherwise whatever he discovers would be stolen by grave robbers and tomb raiders, or eventually destroyed by the elements.

Finally, in response to your question, "Have you come up with any other puzzles except these links you have listed?", my answer is "yes", but those puzzles were made long after I created my puzzles and announced my inventions.  I shall settle with those issues one at a time.

(in reply to aman8888)
Post #: 14
RE: Henry Sudoku - 1/30/2009 4:48:46 PM   
aman8888

 

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From: Singapore
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With my friends and even some strangers, I have discussed the problem of my sudoku variants popping up here and there like mushrooms on some websites, in books and some international championships.  Among them, the opinion of one person, who has a deep interest in Zen, is particularly interesting.

I almost fell off from my chair when he said that such happening shows that my sudoku variants are a great success and it should be viewed as a positive development.  He said that my task is to make it "more positive" by thanking whoever is interested in my sudoku concepts and encouraging him to use more of my ideas, whether on websites or in books!  He said that I cannot force others to advertise for me, but others cannot stop me from advertising myself .  He said I can never stop others from using my ideas, and similarly others can never stop me from trying to get the maximum benefit out of the whole situation.

Now I am putting the advice of that "Zen master" into practice to see how successful it works.

First I have to thank http://www.sudokumasters.in for using my idea of "Twin Corresponding Sudoku" in its so-called "Substitution Twin Sudoku".

I also have to thank http://wsc2008.com for designing a so-called "Group Sum" which is identical to my "Corner Squad Sudoku" in http://www.ageofpuzzles.com/Collections/CornerSquadSudoku/CornerSquadSudoku.htm except that the small clue-numbers in the "new" puzzle are circled.

An article in http://www.notelay.com/articles/did_you_know/what_is_sudoku/ has this interesting comment about sudoku:  "Because Sudoku is logic-based, other puzzles could be created that use the same concept and replace the numbers with other objects, such as colours, letters or shapes."

I have used graphics, Chinese words and the alphabet for my Twin Corresponding Sudoku.  Please refer to the following websites:

http://nrich.maths.org/public/viewer.php?obj_id=5518

http://www.ageofpuzzles.com/Collections/TwinSudokus/TwinSudokus.htm

http://www.chinasudoku.com/

I have to thank http://wsc2008.com for designing its so-called "Alphabet Substitution Twins".  Whatever name the "new" puzzle is called, it is still identical to my "Twin Corresponding Sudoku".

Finally, I hope more people will use my sudoku ideas freely on their websites and in their books, but at the same time as the Chinese saying goes, "remember the source whenever you drink water", so please don't keep me totally out of your limelight.

(in reply to aman8888)
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