This blog deals with grid-based puzzles and the various types of logic and ideas used to solve them. It also contains notices, information and results about various puzzle and sudoku championships across the globe.
Rules of 'Odd Sum Sudoku'
Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. The sum of the numbers in each group of shaded cells should be odd.
This is just the twin brother of Even Sum Sudoku! ;-)
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