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In the realm of chessboard puzzles, the n-queens puzzle stands out as an intriguing problem that tests our strategic thinking. In this blog, we will delve into the challenge of placing n queens on an n x n chessboard in such a way that no two queens attack each other. We will explore the problem statement, discuss the approach, and provide detailed implementations in both Java and Python.   Problem Statement: The n-queens puzzle involves placing n queens on an n x n chessboard in such a way that no two queens are attacking each other. Queens can attack in horizontal, vertical, and diagonal directions.   Example: For a 4 x 4 chessboard, one possible solution to the n-queens puzzle is as follows:   . Q . . . . . Q Q . . . . . Q . In this arrangement, no two queens are attacking each other.   Approach: To solve the n-queens puzzle, we can utilize backtracking. We will recursively try to place queens on the chessboard, ensuring that no two queens attack each other. Starting fro...