![]() ![]() We will now create a Sudoku solver using backtracking by Backtracking is all about choices and consequences. As soon as it determines that a candidate cannot possibly lead to a valid solution, it abandons the candidate. ‘īacktracking is an algorithm for finding all (or some) of the solutions to a problem that incrementally builds candidates to the solution(s). You may assume that the given Sudoku puzzle will have a unique solution.Įmpty cells are indicated by the character ‘. The given board contains only digits 1–9 and the character ![]() Must occur exactly once in each of the 3x3 sub-boxes of the grid. The grids are partially filled (with hints) to ensure a solution can be reached.Īnd you need to fill the empty cells without violating any rules.Ī sudoku solution must satisfy all of the following rules: The most common Sudoku puzzles use a 9x9 grid. The numbers must be placed so that each column, each row, and each of the sub-grids (if any) contains all of the numbers from 1 to ‘n’. Sudoku is a number-placement puzzle where the objective is to fill a square grid of size ’n’ with numbers between 1 to ’n’. ![]()
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