Odd/Even Sudoku

There are a few different versions of this simple Sudoku variant. The original (see the example puzzle) is where only a few cells in the grid are shaded and solvers must discover for themselves if digits in these cells are all odd or all even.

Another version of the Odd/Even Sudoku rules is when ALL cells with even digits are shaded; therefore ALL cells with odd digits are not shaded (or vice versa). This creates a slightly different solving experience.

Even Sudoku or Odd Sudoku are another two versions of this puzzle; here, only a few cells are shaded, but the solver knows from the name of the puzzle whether these cells will contain odd or even digits.