LMI-Überbleibsel 5a - Pfeil Sudoku
(Published on 23. June 2012, 12:00 by Richard)
LMI-Leftovers 5a - Arrow Sudoku
Logic Masters India hosts a sudoku contest every month. I had the honor to prepare the puzzles for the coming contest. It will be held from 7 till 9 July 2012. It will be called "Copy - Paste"; A set of 14 sudoku variants, two per page. I copied the givens of one puzzle, and pasted them into another, so that the grids on every page have exactly the same given digits on exactly the same place. But they are two (completely) different variants, requiring a different approach and having different solutions. Almost all variants are published here in the portal earlier by me.As always the case after making puzzles for a contest, I had a few unused puzzles and I would like to share them here in the portal. At the same time, I can make same extra advertisement for the contest. Participation is free, only a registration at LMI is necessary. You can solve the puzzles whenever you like in the weekend. After downloading the .pdf-file you have two hours time to submit your solutions. You can find the instruction booklet here.
Arrow Sudoku
Apply classic sudoku rules. The digits in the point of an arrow are the sum of the other digits in the same arrow.
Solve online in CtC-app (thx Nick Smirnov!)
Solution code: Row 9, followed by Column 5.
Comments
on 9. October 2022, 07:47 by Richard
Added link and tag for online solving. Thx Nick!
on 7. October 2022, 10:54 by Nick Smirnov
CtC-app:
https://tinyurl.com/4vunrkxf
on 25. June 2012, 11:32 by Richard
Haha, I expected a reaction like this! :-))))
on 25. June 2012, 11:29 by uvo
Okay, seems reasonable. Now, if you could convince the other puzzle authors :-)
on 24. June 2012, 07:30 by Richard
Long time ago I saw an arrow sudoku somewhere. It must have been one of the other type, I don’t know anymore. Much later I made an arrow sudoku myself for a Dutch sudoku championship. I found it logic to write the sum in the tip of the arrow, since an arrow is a symbol that is associated with a movement. You ‘move’ through a number of cells, add the digits there and when you ‘arrive’ in the tip you write the sum down there. This sounds very logical to me. Later, I came across more arrow sudokus of the other type. I noticed they had a circle at the end opposite to the tip. The sum was in the circle. For me that was not logical and there was no sense to me in using an arrow. Just a circle with a line would be fine too. That’s why I kept making my arrow sudokus the way I did. But I think all other sudoku authors worldwide will use the arrow with the sum in the circle; it seems to be the international standard.
Since I really like this type of sudoku, I wanted to include such a puzzle in my second sudoku contest at LMI. I really considered how to draw the arrows. Using the international standards or keep it the way I already did. I decided for the latter, for three reasons. First of all, there is a list with links to more practice puzzles in the forum of LMI. I didn’t feel like telling in that forum thread: beware, the rules of the arrow sudoku to practice are different then the rules in the real test. Second, there are no circles that can cause confusion and the rules are clear. And third I still think this is more logic.
on 23. June 2012, 23:18 by uvo
Was mich an dieser Rätselart immer wieder irritiert: Es gibt anscheinend zwei verschiedene Designs - bei Richard ist die Zahl in der Spitze des Pfeils die Summe, bei Thomas dagegen die Zahl am anderen Ende, siehe z.B.: http://motris.livejournal.com/165662.html
Könnten die Rätselautoren sich bitte auf einen Standard einigen? :-)
