Saturday, August 30, 2014

Tripod Sudoku (Fun With Sudoku #12)


This is very old puzzle which I created for 10th 24 hour Championship.
I have seen this puzzle appearing in the following championships
 
Oguz Atay Puzzle Contest (OAPC)
"18th World Puzzle Championship, Antalya (Turkey)"
 

"The Last Sudoku Competition Before World Sudoku Championship"


Even though I have published this puzzle in year 2010, I wanted to republish this puzzle after improving graphics of this puzzle. Graphics of this puzzle looks very simple, but I had tough time creating image of this puzzle. Reason being that I use MS Excel to create graphics and now becoming very comfortable with creating any puzzle images using Excel. During my stay in Mumbai for Times Sudoku Championship 2014, I got feedback from Rohan that Puzzles/Sudoku I create does not have exact square. He was quite right. Yes, the Sudoku grid I was creating were not having exact square shape. I checked in Excel sheet that cells vertically and horizontally has exactly the same size, still due to bug in MS Excel while showing print preview, it was distorting this size. I corrected this problem after switching view in Excel. But for this I was hit by another problem. MS Excel distorts the shapes inserted in the sheet too. I had a very tough time keeping circles in this Sudoku as perfect circle.
I am re-publishing this Tripod Sudoku as 12th Sudoku of  Fun With Sudoku League.

Rules of Tripod Sudoku 
Fill the grid with digits 1-6 and divide the grid into some regions, so that each digit appears exactly once in every row, column and region. All points where three lines meet are given. There are no points where four lines meet.



Tripod Sudoku (Fun With Sudoku #12)
Tripod Sudoku (Fun With Sudoku #12)

Here is answer to my previous Sudoku League Puzzle titled "Even Sum Sudoku (Daily Sudoku League #56)"

Even Sum Sudoku (Daily Sudoku League #56) Solution
Even Sum Sudoku (Daily Sudoku League #56) Solution
 


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Friday, August 29, 2014

Learning EPS (Encapsulated Post Script) for creating Puzzle and Sudoku Images



Learning EPS (Encapsulated Post Script) for creating Puzzle ImagesI found that its easier to create a puzzle than creating the puzzle image. I use xls file to create puzzle file. But if you know EPS, creating puzzle images becomes very easy. This is the old post, which I am republishing again for benefits of the people who want to learn E(PS).
Here are the step for learning (E)PS to create Puzzle Images. 
Thanks to Deb for this information.

Step1 : install a viewer and an interpreter for PS (PostScript).
Interpreter GhostScript : You don't need right away, but better to download. You can download from same location.
There are also other software to view PS/EPS files. This is the best I've found.
Once you install these software, you can double click on any PS file to view it in GSView.
You have to learn how to write program in PS for different kind of Images (Puzzles). (This is Step4)

Step2 : Create EPS file (Encapsulated PostScript)
You need to create the EPS file from the PS file. The only difference between EPS and PS is, in simple terms, EPS also tells the co-ordinates of the picture in the PS file.
From GSView, you can select Menu -> File -> PS to EPS. Answer "Yes" to all questions. Your EPS file is generated. (You can do a diff between the PS file and the EPS file to see what I mean in the above statement).

Step3 : Create puzzle PDF file
In a Word Document, you can write the puzzle instruction. Then Menu Insert->Picture->From File. Select the EPS file you generated.
If the PS is well-written and you are using MSWord 2000+, you should be able to see a preview of the EPS file. (So this is another way of viewing an EPS file).
Make sure that the text and the Image are properly aligned.
Print into your pdf driver. You are all set.

Step 4: Learn PS.
This is like learning any language. The best thing is that PS is very easy and fun to learn. You should be able to write your first usable PS program in 8 to 10 hours. The worst part is the syntax is stack based. If you are used to write in C like languages, you will find it pretty odd.
Couple of references :
This will be an ongoing process.

Step 5 : Writing Re-Usable PS code and Improving PS programming style. Again this will be an ongoing process. You can write your PS program such that you change it minimally to create a different puzzle and a different image.

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Thursday, August 28, 2014

Even Sum Sudoku (Daily Sudoku League #56)


Yesterday, I posted Picture Sudoku. It was like solving four Sudoku simultaneously. Do try it in case you have not yet downloaded and solved it. 
Regarding today's Even Sum Sudoku, I tried to make it symmetrical as far as possible. When solving at the end to avoid multiple solution, I have to add another greyed area in center box which contains one given number as hints. 


LMI August Beginners' Puzzle Contest started from today. Do participate in this. This month's puzzles in this contest are Cave and Yajilin.
This Even Sum Sudoku is my 56th contribution for The League of Extraordinary Ladies and Gentlemen.

Rules of Even Sum Sudoku
Classic Sudoku Rules apply. Additionally sum of digits in the two continuous horizontal or vertical greyed cells should be Even.
Even Sum Sudoku (Daily Sudoku League #56)
Even Sum Sudoku (Daily Sudoku League #56)

Here is answer to my previous Sudoku Puzzle titled "Picture Sudoku (Fun With Sudoku #11)"
Picture Sudoku (Fun With Sudoku #11) Solution
Picture Sudoku (Fun With Sudoku #11) Solution


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