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Step by step example of solving a level 5 (very hard) sudoku puzzle
| Step 47 |
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Let’s look at the middle left box of the sudoku (where DEF cross JKL). This is a very interesting step where you can also check your sudoku success (or failure) so far. There’s only one blank cell in all of the following: Column K, Row E, and middle left box. Remember the sudoku rules: The numbers 1 through 9 must show in every column, row and box (obviously only once). Hence, this one blank cell must have one unique number that would satisfy sudoku rules. A quick examination would make it abundantly clear that the number 7 must be in cell EK. |
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9 |
1 |
| 3 |
7 |
2 |
| 8 |
Step47: 6 |
5 |
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