Extension method: int TranslateCoordinate(this string, int)

Declaration

public static int TranslateCoordinate(
    this string str,
    int gridWidth = 9
)

Converts a convenient coordinate notation into a puzzle-grid index.

this string	str	A string such as `"E2"`. The letter is assumed to be a column (starting from A) while the digit is a row (starting from 1).
int	gridWidth	The width of the puzzle grid. For a standard Sudoku, this is 9.

A cell index.