Solving Odd-Even Sudoku: (Section Solving)

The easiest method of solving an Odd-Even Sudoku is solving it in two parts. First solve the even numbers and then solve the odd numbers or vice-versa. The positions of the given odd numbers provides no clue for solving the even numbers and vice-versa, hence, it boils down to solving this sudoku in two sections.

Take a look at Puzzle No.266

Notice that every row/column/box contains four shaded cells, one for each even number.


Try solving the even numbers. Concentrate just on the even numbers and the shaded cells.


Using the basic sudoku rules, you should be able to solve it.


Now try solving the odd numbers. Concentrate just on the odd numbers and the unshaded cells.


Again using the basic sudoku rules, you should be able to solve it.


Thats it! Puzzle is solved! Use these two together and you should be able to crack any Odd-Even Sudoku without much trouble.

Other Solving Techniques

Puzzle No.271

This is an Odd-Even Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.271: ODD-EVEN SUDOKU


SOLUTION:

Puzzle No.266

This is an Odd-Even Sudoku from the Indian Sudoku Championship - 2010.

PUZZLE NO.266: ODD-EVEN SUDOKU


SOLUTION:

Puzzle No.70

This is an Odd-Even Sudoku.

PUZZLE NO.70: ODD-EVEN SUDOKU


SOLUTION:

Puzzle No.59

This is an Odd-Even Sudoku from the Bulgarian Sudoku Championship - 2007.

PUZZLE NO.59: ODD-EVEN SUDOKU


SOLUTION:

Puzzle No.8

Puzzle: Odd-Even Sudoku
Author: Rohan Rao

PUZZLE NO.8: ODD-EVEN SUDOKU


SOLUTION:

Puzzle No.7

Puzzle: Odd-Even Sudoku
Author: Rohan Rao

PUZZLE NO.7: ODD-EVEN SUDOKU


SOLUTION:

Puzzle No.6

Puzzle: Odd-Even Sudoku
Author: Rohan Rao

PUZZLE NO.6: ODD-EVEN SUDOKU


SOLUTION:

Puzzle No.5

Puzzle: Odd-Even Sudoku
Author: Rohan Rao

PUZZLE NO.5: ODD-EVEN SUDOKU


SOLUTION:

Rules of 'Odd-Even Sudoku'

Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. Shaded cells contain even numbers while other cells contain odd numbers.

EXAMPLE:


UNIQUE SOLUTION: