After checking we will assign the number, and recursively check whether this assignment leads to a solution or not. BackTracking Approach: In this approach, we will assign the numbers one by one to the empty cells but before assigning we will check whether it is valid or not.If valid then we will print the matrix else repeat the same process for different cases. Once all the unassigned positions are filled, we will check if the matrix is valid or not. Then we will try every configuration one by one until the correct configuration is found. Naive Approach: In this approach, we will generate all possible configurations of numbers from 1 to 9 to fill the empty cells. The above problem can be solved in two ways: Here, we are given a 9*9 2D array grid and our main task is to fill all the empty cells with digits from 1-9 such that every row, column, and subgrid of size 3×3 contains exactly one instance of the digits from 1 to 9.īelow is the pictorial representation of the same. In this tutorial, we will see how to solve a sudoku puzzle.
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