The variations in Round2 in this month are Extra Region Sudoku, XV Sudoku, Irregular Sudoku, Frame Sudoku,

Rules and examples are provided below.

## AuthorSudokus for February 2013 are written By Prasanna Seshadri, Deb Mohanty |
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## Classic SudokuPlace the digits 1 through 9 into the empty cells in the grid so that each digit appears exactly once in each of the rows, columns, and bold outlined 3X3 boxes. Answer key for the above Sudoku is : 416978325, 327186459 ## Extra Region SudokuApply Classic Sudoku rules. ## XV SudokuApply Classic Sudoku rules. ## Irregular SudokuEvery digit from 1 through 7 has to appear exactly once in every row, every column, and outlined regions. Each outlined region has 7 cells and is marked by thick borders. ## Frame SudokuApply Classic Sudoku rules. If you want to print this page, click here to print without the background colors |