When We Use Backtrack?

Examples where backtracking can be used to solve puzzles or problems include: Puzzles such as eight queens puzzle, crosswords, verbal arithmetic, Sudoku, and Peg Solitaire. Combinatorial optimization problems such as parsing and the knapsack problem.

When should I use backtracking?

When to Use a Backtracking Algorithm

The backtracking algorithm is applied to some specific types of problems. For instance, we can use it to find a feasible solution to a decision problem. It was also found to be very effective for optimization problems.

How do I use backtracking?

Algorithm. Step 1 − Start from 1st position in the array. Step 2 − Place queens in the board and check. Do, Step 2.1 − After placing the queen, mark the position as a part of the solution and then recursively check if this will lead to a solution.