Approach for How To Solve Sudoku Puzzles 11

5, ,9 7

8,9

7,9

1, ,8 7

4,5,8

4,5,7

4,6,8

1,5, ,8 7 5,6, ,8 7

1, ,8 7

1,4,6,8

4,6,8,9

1,6, ,8 7

4,8

8,9

4,8,9

4,9

2,6,8

2,3,6,8,

3,6,8

1,8

6,8 1,6,8 8 1,8,9

Approach for How To Solve Sudoku Puzzles 11

4, ,9 7 5, ,9 7

8,9

7,9

1, ,8 7 1, ,8 7

1, ,8,9 7 7,8

4,5,8

4,5,7

4,6,8

1,5, ,8 7 5,6, ,8 7

1, ,8 7

1,6, ,8 7

1,4,6,8

4,6,8,9

1,6, ,8 7

7,9

1, ,8 7

4,9

hen you can't make a direct deduction, see if a series of deductions (based on the logic: “if this Cell takes this Wvalue”) leads to a resolution of the right Cell for a value.

This is similar to the Coloring Approach for How To Solve Sudoku Puzzles, but is different in the sense that we are not looking for just only one value here, but a series of values. In a manner of speaking, this is similar to the “X-Y Wing

Approach for How To Solve Sudoku Puzzles”, except that, in this Approach for How To Solve Sudoku Puzzles, we need not look for a pattern of the position of the Cells like in “X-Y Wing Approach for How To Solve Sudoku Puzzles”. And therefore, this is no Axiom, and the deductions must be made on a case-to-case basis. Let's see this Approach for How To Solve Sudoku Puzzles thru an Example on How To Solve Sudoku Puzzles.

If Cell (2, 2) takes the value '1', Cell (2,8) will take '2', Cell (3, 9) will take '3', Cell (8, 9) will take '4' and Cell (8, 2) will take '5'. And there are no conflicts.

Approach for How To Solve Sudoku Puzzles 12

1, 2

2, 5 4, 5

3, 4

2, 3

However, if Cell (2, 2) takes the value '2', Cell (2,8) will take '3', Cell (3, 9) will take '4', Cell (8, 9) will take '5' and Cell (8, 2) will take '2'. Now there is a conflict. So, this set of values is not right.

So, we are able to deduce that we should go with the assumption that Cell (2, 2) takes the value '1', and fill up the rest of the Cells on this basis.

This is called 'Forcing Chains' Approach for How To Solve Sudoku Puzzles.

Previous Page