The New Sudoku Players' Forum

[PeetNeef]

Hey guys, can you help me out with this one? Just some techniques how I could tackle this one? I could have solved it with color wrapping, but I don't really like these placement techniques. I rather solve it with elimination techniques!

https://ibb.co/tKz88wM

[Hajime]

There is a skyscraper on candidate 3 in r2c8=r2c6-r8c6=r8c9
Original puzzle: ...4...5..58...2.9....5..6...47...1.2..9.8..7.9...53...8..6....9.1...42..4...1...
Isn't your puzzle #12 ?

[PeetNeef]

Great, thanks Hajime!!

Hahah you're better at keeping track of my topics than me. I saw that I even duplicated another one, so honestly this was #13

[eleven]

These are remote pairs. They are easier to spot than skyscrapers/kites, but of course not that common. The starred cells cannot be 1 or 2.

Code: Select all

12 . . | 12 . *       12 . . | 12 . *      12 . . | 12 .  * |  * .  *         
 . . . |  . . *        . . . |  . . .       . . . |  . .  . |  . .  .
 . . . |  . . *        . . . |  . . .       . . . |  . . 12 |  . .  *
----------------      ----------------      ---------------------------
 . . . |  * . .        . . . | 12 . .       * . . |  . .  * |  . . 12
12 . . |  * . 12       . . . |  . . .       . . . |  . .  . |  . .  .
 . . . |  * . .        * . . |  . . 12      * . . |  * . 12 | 12 .  .