Logic Masters Deutschland e.V.

Battlefield Sudoku #5: Archers!

(Eingestellt am 28. Juli 2020, 19:57 Uhr von Big Tiger)

Standard Sudoku Rules apply to the final numerical layout.

The Battlefield Basics: On this ancient battlefield, 36 armies fought: 9 from each horizontal direction, and 9 from each vertical direction. Each army advanced X cells, with X being the first number at their end of their row or column, and counting the first cell as part of their advance.

Where two opposing armies overlapped, there was a bloody battle and resulting casualties. Where two opposing armies ceased advancing and declared a truce before a battle could ensue, lives were thankfully spared.

The Numbers outside each row and column indicate the sum of either the casualties or the lives spared, but do not indicate whether it was a battle or a truce.

On the puzzle grid, Red Cells indicate all the fields where both a row and a column engaged in battle. Green Cells indicate all the fields where none of the four armies from that row or column ever entered.

For this Battle, Archers are in position to fire as well. Numbers by each arrow are the sum of the digits along the diagonals indicated by the arrows. Digits may repeat along diagonals. (You may know Archers better as Little Killer Cages.)


Setter's Diary :: July 28, 2020 :: As the Battlefield spreads among a handful of enthusiastic setters, I return to it myself with the inclusion of "archers", which I figured was the best symbolism to associate with the arrows of Little Killer Cages.

Lösungscode: Row 5 then Column 5

Zuletzt geändert am 17. November 2020, 08:50 Uhr

Gelöst von Greg, Yohann, henrypijames, adam001, geronimo92, Nylimb, NikolaZ, Hareeb, marcmees, Julianl, japoorva, MumboJumbo, ch1983, pippilotta, skywalker, GTLSE, rimodech, DiMono, SirWoezel, zorant, sandmoppe
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Zuletzt geändert am 3. August 2020, 10:29 Uhr

am 3. August 2020, 08:58 Uhr von Realshaggy
I don’t think that will be well received. Existing puzzles shouldn‘t be changed unless there is an error imho. At least it was handled that way in the last 12 years.

*** Oh, I meant actually removing this entry - deleting it. I wouldn't just replace the image above without creating an entire new puzzle page.

am 3. August 2020, 08:29 Uhr von Big Tiger
Given the increased abundance of puzzles on the site, I'm mulling scrapping this one and replacing it with a version more challenging. Thoughts on that?

Zuletzt geändert am 29. Juli 2020, 16:53 Uhr

am 29. Juli 2020, 16:52 Uhr von japoorva
Nice puzzle! @Stephane, Thank you for the penpa link :)

am 28. Juli 2020, 22:26 Uhr von stephane.bura
Here's a Penpa grid with the 8-way arrows :)

am 28. Juli 2020, 21:28 Uhr von Yohann
@henrypijames: yes, they're classic little killer

Zuletzt geändert am 28. Juli 2020, 21:48 Uhr

am 28. Juli 2020, 21:26 Uhr von henrypijames
Clarification again: So the little killers are classic? They even include green cells, i. e. cells that are gaps both in row and column?

BTW, I don't think creative storytelling needs to be avoided to eliminate ambiguity. Using precise words is also good, but it's not the most powerful tool against ambiguity - redundancy is. When in doubt, say the same thing in two or three different ways. That's what makes legalese the way it is - it's full of redundancy to eliminate ambiguity. I believe many puzzle description on this site could benefit from additional redundancy in the explanation of their rules.

*** "the sum of all digits"

*** No, I don't plan to avoid storytelling in the future. But in my initial instructions, I called the damage done by the archers "casualties", which first caused Stephane to think that they would operate like the normal armies: firing from each end. So that one was easy enough to simply write out of the instructions to avoid confusion. :-)

Zuletzt geändert am 28. Juli 2020, 21:31 Uhr

am 28. Juli 2020, 21:20 Uhr von Yohann
At first I thought the little killers would be battlefield clues, then I had the same idea as stephane. I was so wrong XD. I should stop toying with variable-length battlefields. Nice one anyway

*** Well, you seem to have solved it rather quickly anyway, lol. Was it my instructions? - I did a re-write just to make it clear the arrows were Little Killers, plain and simple...

*** Nope. I simply noticed it wouldn't work. They had to be standard

am 28. Juli 2020, 20:50 Uhr von Big Tiger
Dropping "casualties" from the description of Archers to avoid confusion that it should be deduced the same way as the rows and columns. That's what I get for trying to infuse creative storytelling into every aspect, ha ha.

Zuletzt geändert am 28. Juli 2020, 20:53 Uhr

am 28. Juli 2020, 20:48 Uhr von henrypijames
Clarification on the little killers: Green cells obviously don't count; but do red cells count just once or twice? Because when you say "total casualties in the direction of each respective arrow", the word "total" suggests double counting a red cell for both its casualty value in the row and in the column.

*** I was working on clarifying that even as you were writing. :-D I have considered some kind of version where the casualties inflicted by the Archers are subtracted from the possible casualties by the row/column armies but I haven't yet made myself sit down and suffer through creating such a puzzle, ha ha.

Zuletzt geändert am 28. Juli 2020, 20:57 Uhr

am 28. Juli 2020, 20:42 Uhr von stephane.bura
Use the 8-way arrows.
When reading the rules, I thought the archers summed the actual casualties (overlap cells in their diagonal). That would be a neat idea to explore, maybe.

*** I may try that out someday, but I wasn't in the mood to hurt my brain today, ha ha. And thank you, when I get back from my short vacation I will look at the 8-way arrows on Penpa!

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