INSTRUCTIONS:

Enter N, the desired height and width of the chess board, and hit "Submit".

Your goal is to place N queens on the board, such that no two queens are attacking each other.

Click squares on the board to place queens. Squares that are under attack by another queen will be highlighted in red.

The number of queens you have placed, as well as the number of ways to safely placed N queens given the queens you have already placed, will be updated in real time on the bottom right.

Press "Reset board" to fully clear the board of all queens.

Press "Backtrack" to take back your previous move (i.e. remove the previously placed queen).