6,7,9 5,6,7 2,5,9

5,7,9

1,5,9

1,5,6 5,6

1,5,9

Alternatively, if Cell (1,9) takes the value '5' in C9, then Cell (1,5) & (6,9) can't take the value '5'. Therefore, Cell (9,5) takes the value '5' in C5, and Cell (6,2) takes the value '5' in R6. And there is no other possibility by which the 3 Rows R1, R6 & R9, as well as the 3 Columns C2, C5 & C9 can have one Cell in each taking

the value '5'. From the above, we see that the possibility of Cell (5, 2) taking the value '5' is eliminated in both the cases. So, we can eliminate the possible value 5 from Cell (5,2), as below:

6,7,9 5,6,7 2,5,9

7,9

1,5,9

1,5,6 5,6

1,5,9

Solve the puzzle from here, and compare your solution with the answer

below.

Solved Exercise on How To Solve Sudoku Puzzles: 6

8

4

8

8

6

Partly Solved Exercise on How To Solve Sudoku Puzzles - 7 (Involving Indirect Interaction Approach for How To Solve Sudoku Puzzles) Here's another partly solved puzzle, and you've reached the position as below:

In the Top Left Major Square, there are only 2 Cells (1,3) & (3,3) that can take the value '9'. Likewise, in the Top Mid Major Square, there are only 2 Cells (1,5) & (3,5) that can take the value '9'. The Top Right

Major Square also has still to take the value '9'.

By the Indirect Interaction Approach for How To Solve Sudoku Puzzles, we can eliminate '9' as a possible value from the Cells (1,7), (1,8), (1,9), (3,7), (3,8) and (3,9), as below:

Solve the puzzle from here, and compare your solution with the answer below.

Solved Exercise on How To Solve Sudoku Puzzles: 7

2

4 6 3 1

4 8

3

4

2 1

9

4

6 1 8 7 2 4

9 6

5 3 1

4 9

2 5 3

7

6

9 2

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