RetroFed Forum
Your home away from modern life.
Another Sudoku help request
Post Reply
AuthorMessage
Seefoo lemmy.world Seefoo@lemmy.world
Joined: 2024-06-15
Quote

Teach me the next step

4   Original
Poayjay lemmy.world Poayjay@lemmy.world
Joined: 2023-07-22
#2 · Quote Reply

Look at the bottom right 3x3 box. See that there are two squares that have 567 and one that has 75.

Think about it. If one of the squares is a 5 then the others must be a 6 or 7. If one is a 6 then the others must be a 5 or 7. If one is a 7 then the others must be a 5 or six. Since each 3x3 box can only have each number once, you can eliminate all of the other 567 possibilities in that 3x3 box. The center of that 3x3 box must be a 3. You can keep going from there.

This technique works on 3x3 boxes and rows

8
Seefoo lemmy.world Seefoo@lemmy.world
Joined: 2024-06-15
#3 · Quote Reply

Look at the bottom right 3x3 box. See that there are two squares that have 567 and one that has 75. Think about it. If one of the squares is a 5 then the others must be a 6 or 7. If one is a 6 then the others must be a 5 or 7. If one is a 7 then the others must be a 5 or six. Since each 3x3 box can only have each number once, you can eliminate all of the other 567 possibilities in that 3x3 box....

That is that was it!

1
Post Reply
Back to top