I think I found a problem with the logic...or... the way you used it. With this technique you have two available spaces in two rows or columns which the 2 can go so you actually need two numbers that can go there and only two...no more. The only way in which the technique would ever work is if you had the two same numbers that go in the x wing fashion. you used one. There was a possiblity that two other numbers(including the 2) could've gone in one of those positions.
No, it doesn't matter how many possible numbers there are for the square as long as you find a row where the 3 (for example) can only go in one of 2 columns and then find another row where the 3 can only go in one of the same 2 columns. So no matter what the
3's in those 2 columns have to go in those 2 rows.
So you can eliminate the 3's anywhere else in those 2 columns, hopefully allowing you to proceed with the puzzle. I hope that makes sense, I tried to illustrate this visually using my fingers in the video.
keewl
theteeway 1 year ago
@theteeway thanks
tenacross 1 year ago
I think I found a problem with the logic...or... the way you used it. With this technique you have two available spaces in two rows or columns which the 2 can go so you actually need two numbers that can go there and only two...no more. The only way in which the technique would ever work is if you had the two same numbers that go in the x wing fashion. you used one. There was a possiblity that two other numbers(including the 2) could've gone in one of those positions.
Donlass2 3 years ago
No, it doesn't matter how many possible numbers there are for the square as long as you find a row where the 3 (for example) can only go in one of 2 columns and then find another row where the 3 can only go in one of the same 2 columns. So no matter what the
3's in those 2 columns have to go in those 2 rows.
tenacross 3 years ago
So you can eliminate the 3's anywhere else in those 2 columns, hopefully allowing you to proceed with the puzzle. I hope that makes sense, I tried to illustrate this visually using my fingers in the video.
tenacross 3 years ago
i'm just finishing up a silly little sudoku video :P
katieMCbindergarten 3 years ago
Looking forward to watching it
tenacross 3 years ago
oh- but it's already up :D
check it! ha... it's not much :P
katieMCbindergarten 3 years ago
I have a Shortz sudoku book with a puzzle I found to be unsolvable. It's incredibly frustrating.
MrSudoku 3 years ago
I've been beat by a few of the "Beware! Very Challenging" puzzles but overall it's great fun.
tenacross 3 years ago