I need help with this

Post the puzzle or solving technique that's causing you trouble and someone will help

I need help with this

Postby 813554 » Sat Sep 22, 2018 1:58 pm

This is the puzzle: https://imgur.com/a/dsq1g4j

And here's how I solve a puzzle: When I'm trying to solve a puzzle and get stuck, I open Paint, enlarge it 800% and draw the board with pixels. I usually make something like this (this is an old puzzle, I couldn't solve it and gave up in the end but I may solve it if I try now): https://imgur.com/a/zUfmSVF

I think you can see my logic there. Anyway for this puzzle I've created a different one. It doesn't show where the numbers are it just shows the possible places: https://imgur.com/a/KeEwvKQ

I tried to make something out of this but I failed so I hope that you can show me how to solve this one.

PS: That last image gave me another idea, actually it could be fun to just look at that and try to find actual places for the numbers but it might be too easy I don't know I didn't try.

PS 2: I know there's another coloring techniques which's more helpful but I don't know why I didn't try one of them. I can do it in my next puzzle.
813554
 
Posts: 16
Joined: 05 September 2018

Re: I need help with this

Postby 813554 » Sat Sep 22, 2018 2:02 pm

Wow anyway I don't know why I didn't see this but now I can see that r1c4 can not be 9. I can probably solve this one now.
813554
 
Posts: 16
Joined: 05 September 2018

Re: I need help with this

Postby 813554 » Sat Sep 22, 2018 2:07 pm

But why? Why R1C4 can't be 9? I thought the same again, if r1c2 is 9 in b1 then r2c5 is 9 in b2. If r2c1 is 9, then r1c5 is 9 so there's no way r1c4 can be 9. That was my logic. It's not directly trial and error maybe but it's based on assumptions. Is this some sort of kite too? Because I can't see it. Why r1c4 can't be 9?
813554
 
Posts: 16
Joined: 05 September 2018

Re: I need help with this

Postby 999_Springs » Sat Sep 22, 2018 2:45 pm

you have yourself a skyscraper of 9s in r2c15 and r4c14. because they both share column 1 you have to have 9r2c5 true or 9r4c4 true, which means that any candidate that can see both of those must be false. so you have that r1c4 and r5c5 must not be 9

this pattern of two strong links on the same number is generally called a turbot fish. if they're parallel like you have them here you can call it a skyscraper, if they're perpendicular you can call it a kite, if they're neither then it's an empty rectangle or something. you can read up about turbot fish here

edit: your 2nd and 3rd pics look like something out of a 1980s video game, rocking the retro look
Once upon a time I was a teenager who was active on here 2007-2011
ocean and eleven should have paired up to make a sudoku-solving duo called Ocean's Eleven
999_Springs
 
Posts: 431
Joined: 27 January 2007
Location: In the toilet, flushing down springs, one by one.


Return to Help with puzzles and solving techniques