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Battleships Puzzle #1181 by Bram
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LiefKleinKonijntje



Joined: 31/01/2012 20:23:37
Messages: 2
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Number: Puzzle #1181
Genre: Battleships
Author: Bram
Appeared at: February 4, 2009

Hi all!

New to this site, but really liking it. Question: has anyone solved this particular puzzle through sheer logic without guesses. That's usually my favorite method, but here I had to resort to trying out different positions for the 3-ship until one worked. Of course, you can make educated gueses (room is tight, so the 3-ship most likely appears both on the horizontal and vertical 3-column/row), and I did solve it, but still, it isn't as rigid and sound as I would like it.

So, can it be done without guessing, and if so, could anyone give me a hint?

Thanks and kind regards, LKK
Valezius



Joined: 25/11/2010 01:21:26
Messages: 45
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Without guessing means to me if you have just a pen, can you solve the puzzle?
So this claims many forethinking in your head. And there isn't big difference between quessing or forethinking.

Here is my solving method without details.

R4C2/R4C4 are empty. (In the next rows I wont mark that empty, I will sign if the corresponding square a ship part.)
R2C4
R6C2
R2C2

And now, easy to see the 3-long ship cannot be in 3. column. So
R6C4
R3C3--ship and R3C6
R3C2--ship and R2C1/R4C1/R3C5/R1C2/R5C2
R5C6/R1C6
R3C1--ship and R3C4
R5C3--ship

I think now you can finish the puzzle alone.
LiefKleinKonijntje



Joined: 31/01/2012 20:23:37
Messages: 2
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Thanks Valezius, that was very helpful! Meanwhile I've improved to more or less using your solving method, but when you say "it's easy to see" I typically have to pencil it in using a different color!

Kind regards, LKK
Bram



Joined: 04/03/2008 13:59:34
Messages: 359
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It's harder than its rating. I should have rated it higher. I am always a bit afraid to rate small puzzles high though as people will generally work their way through a small puzzle really quickly, if it's difficult or not.
Valezius



Joined: 25/11/2010 01:21:26
Messages: 45
Offline

LiefKleinKonijntje wrote:
Thanks Valezius, that was very helpful! Meanwhile I've improved to more or less using your solving method, but when you say "it's easy to see" I typically have to pencil it in using a different color!

Kind regards, LKK 


Okey not easy, but I couldn't find easier step
 
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