I'm working on becoming familiar with wings, chains, uniques, and all the sea animals and skyscrapers. Whatcha see here?
Practicing advanced Sudoku techniques - anyone see anything fun here?
I'm working on becoming familiar with wings, chains, uniques, and all the sea animals and skyscrapers. Whatcha see here?
5 Comments
metiulekm@sh.itjust.works · 2 pts · 2y
::: spoiler spoiler 379 in the upper right box cannot be a 7 or a 9, due to this chain:
Buddahriffic@sh.itjust.works · 2 pts · 2y
I noticed the same thing if you place ::: spoiler spoiler 7 in the lower right square if the top left group, makes it impossible to place a 7 in the bottom middle group. :::
TimewornTraveler@lemm.ee · 2 pts · 2y
Nice! Isn't that also an XY-wing?
::: spoiler spoiler I think we could prove that C9 is 3 by just looking at C3 and H9, right? :::
edit: named wrong cells
metiulekm@sh.itjust.works · 1 pts · 2y
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? :)
TimewornTraveler@lemm.ee · 2 pts · 2y
it's okay, I think I'm wrong. you have to use remote pairs to solve it
There's also a unique rectangle, too!