Sudoku types for month July 2012

There will be 4 Classic Sudokus in Round1.
The variations in Round2 in this month are Trio Sudoku, Odd Even Sudoku, Alphabet Sudoku, Diagonal Sudoku,
Rules and examples are provided below.

Author

Sudokus for July 2012 are written By Deb Mohanty

Classic Sudoku

Place 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

Trio Sudoku

Apply Classic Sudoku rules.
Some cells will have circles inside and some others will have squares. Cells with circles must contain the digits 1, 2 and 3. Cells with squares must contain the 4, 5 and 6. Blank cells must contain the digits 7, 8 and 9.

Odd Even Sudoku

Apply Classic Sudoku rules.
All shaded cells must contain even digits. All white cells must contain odd digits.

Alphabet Sudoku

Place the letters A through I into the empty cells in the grid so that each letter appears exactly once in each of the rows, columns, and bold outlined 3X3 boxes.

Diagonal Sudoku

Place 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, bold outlined 3X3 boxes, and every diagonal marked by lines.

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