N-Queens II
Explore how to apply backtracking to count all valid arrangements of n queens on an n by n chessboard without conflicts. This lesson helps you understand the problem constraints, develop a clear strategy, and implement a backtracking solution efficiently.
We'll cover the following...
Statement
Given an integer, n, representing the size of an n x n chessboard, return the number of distinct ways to place n queens so that no two queens attack each other. A queen can attack another queen if they are in the same row, column, or diagonal.
Constraints:
n
Examples
Understand the problem
Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:
N-Queens
What is the correct solution to the 1-Queens problem?
0
1
2
4
Figure it out!
We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.
Try it yourself
Implement your solution in solution.js in the following coding playground.
function totalNQueens(n){// Replace this placeholder return statement with your codereturn -1}export {totalNQueens}