TimewornTraveler@lemm.ee to Sudoku@sh.itjust.worksEnglish · 10 months agoPracticing advanced Sudoku techniques - anyone see anything fun here?lemm.eeimagemessage-square5fedilinkarrow-up17arrow-down11file-text
arrow-up16arrow-down1imagePracticing advanced Sudoku techniques - anyone see anything fun here?lemm.eeTimewornTraveler@lemm.ee to Sudoku@sh.itjust.worksEnglish · 10 months agomessage-square5fedilinkfile-text
I’m working on becoming familiar with wings, chains, uniques, and all the sea animals and skyscrapers. Whatcha see here?
minus-squaremetiulekm@sh.itjust.workslinkfedilinkEnglisharrow-up2·edit-210 months ago spoiler 379 in the upper right box cannot be a 7 or a 9, due to this chain:
minus-squareTimewornTraveler@lemm.eeOPlinkfedilinkEnglisharrow-up2·edit-210 months agoNice! Isn’t that also an XY-wing? spoiler I think we could prove that C9 is 3 by just looking at C3 and H9, right? edit: named wrong cells
minus-squaremetiulekm@sh.itjust.workslinkfedilinkEnglisharrow-up1·10 months agoHuh, I have been looking at the grid for like 10 minutes after seeing your message (with the edit) and can’t see it at all. Could you explain some more? :)
minus-squareTimewornTraveler@lemm.eeOPlinkfedilinkEnglisharrow-up2·10 months agoit’s okay, I think I’m wrong. you have to use remote pairs to solve it There’s also a unique rectangle, too!
minus-squareBuddahriffic@sh.itjust.workslinkfedilinkEnglisharrow-up2·10 months agoI noticed the same thing if you place spoiler 7 in the lower right square if the top left group, makes it impossible to place a 7 in the bottom middle group.
spoiler
379 in the upper right box cannot be a 7 or a 9, due to this chain:
Nice! Isn’t that also an XY-wing?
spoiler
I think we could prove that C9 is 3 by just looking at C3 and H9, right?
edit: named wrong cells
Huh, I have been looking at the grid for like 10 minutes after seeing your message (with the edit) and can’t see it at all. Could you explain some more? :)
it’s okay, I think I’m wrong. you have to use remote pairs to solve it
There’s also a unique rectangle, too!
I noticed the same thing if you place
spoiler
7 in the lower right square if the top left group, makes it impossible to place a 7 in the bottom middle group.