How can I implement the N-Queens algorithm in Python?

How can I implement the N-Queens algorithm in Python?

To implement the N-Queens algorithm, you can use a backtracking approach. Would you like a step-by-step guide?

Yes, please provide the steps.

1. Create a function to check if a queen can be placed. 2. Use recursion to place queens row by row. 3. Backtrack if a placement leads to no solution.

Can you show me a sample code for that?

Sure! Here's a simple implementation:

def is_safe(board, row, col):
    # Check this row on left side
    for i in range(col):
        if board[row][i] == 1:
            return False
    # Check upper diagonal on left side
    for i, j in zip(range(row, -1, -1), range(col, -1, -1)):
        if board[i][j] == 1:
            return False
    # Check lower diagonal on left side
    for i, j in zip(range(row, len(board)), range(col, -1, -1)):
        if board[i][j] == 1:
            return False
    return True

# Further implementation goes here...

Thanks! How do I run this code?

You can run this code in any Python environment. Just make sure to define the board and call the function to start placing queens.