Problem 54770. Count the peaceful queens

In a 5x5 chessboard with a queen of one color (white, say) on the perimeter, one can place 12 black queens on the board such that none of the black queens can attack the white one (or vice versa).
Write a function that returns the number of queens that cannot attack a queen of the other color placed anywhere on the perimeter of an nxn chessboard.
Solve

Solution Stats

65.35% Correct | 34.65% Incorrect
Last Solution submitted on Dec 28, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers75

Suggested Problems

More from this Author318

Problem Tags

chess oblong sequence

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!