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Step by step example of solving a level 5 (very hard) sudoku puzzle

Step 26   Now, this is where things get more than a bit tricky. This is the hardest sudoku play you would ever make… hands down. It will take all your sudoku know-how and experience to solve this sudoku step. So please go get your cup of coffee (or tea if you like tea more), take some time off to relax, and then take your sweet time to go over the sudoku logic of this step. Normally there’s always away to pinpoint at least one cell of the table with one, and only one unique number. Now, in this step we’re facing a situation that every cell in this sudoku table has at least 2 options. We have spent a long time trying to find one unique solution and to no avail. We are going to solve this step in a less desirable way and this is how we’re going to do it:

Let’s look at the bottom center box of the sudoku game (where GHI cross MNO). We know that the numbers 1 and 4 are missing and there are only two blank cells, but we’re not exactly where the numbers should be. Both cells, GM & IM, can have either the number 1 or 4. We are going to first try to put the number 1 in cell GM. Please see a solution page of WHAT NOT TO DO. Please note that the notation ‘Wr’ stand for wrong.


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J K L M N O P Q R
A
B
C
D
E
F
G
H
I
1   7
5 4  
9   6
3 4  
6 2  
8 7  
   
    7
    4
4   1
3 2
8  
2 6 8
9 5 4
7 1 3
3   5
    8
4 2
2  
6  
7  
Step26: 4 9 7
5 8 2
3 6
5 6 3
7 4 1
9 8 2



   
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