The N-Queens Problem - Extended

The classic problem of N queens, originally published by Max Bezzel in 1848, is defined like this: Place N queens in a NxN chessboard so that no queen threatens any other. As you already may know, a queen threatens another chess piece if they share the same row, column or diagonal. This website simulates a slight alteration of the N queens problem, where in a NxN chessboard we need to place M queens ( M <= N) so that no queen threatens another and additionally, all chessboard tiles are threatened by at least one queen.

Pick a chessboard size N and an amount of queens M so that M<=N, select the speed you want the problem to run and hit on "Simulation" button.


  • 4x4
  • 5x5
  • 6x6
  • 7x7
  • 8x8
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8


  • {{solution}}

Boardsize: {{size}} / Queens: {{queensNo}}