Java Programming:

I need lots of help. Currently Im working on a program that will use backtracking to help solve the following problem:

Im trying to use my three methods to help solve a Sudoku problem using backtracking. Im trying to write a method that will implement the backtracking process but Im having trouble with the logic. So far I have my three rules for Sudoku in the following methods:

I then placed all three rules in a isSafe method to make it easier:

public static boolean columnValid(int [ sudokuBoard, int col, int checkValue) int checkRow; for (checkRow= 0; checkRow