They must place eight queens on a chessboard, eight rows and eight columns so that for each column, for each row and for each diagonal there is only a queen, and that no queen must be in check by the other queens according to the rules of the game of chess. The possible solutions are 92.

To proceed quickly in the game it is recommended to use a pen or pencil for smartphones.

When starting the app you have a first presentation screen, where you can see the animation of the game the solutions to the eight queens. Touching the "STOP" button stops the display of solutions; if you touch the "PLAY" resumes the animation.

Before moving to the next screen is preferable for increased speed of the game off the animation and the background audio, tapping the "STOP" button and pause the audio.

To move to the next screen, touch the "PLAY" and you can play immediately without touching any control. Before you touch the queen to move, then the box where to place the queen. When they found a solution this appears in the form like this: Solution # 1: 1 5 8 6 3 7 2 4 which has the following signficato:
-N ° 1 is the number of the solution;
-The Queen of the first column in the row 1;
-The Queen of the second column is in row 5;
-The Queen of the third column is the line 8;
-The Queen of the fourth column is in line 6;
-The Queen of the fifth column in the row 3;
-The Queen of the sixth column is in row 7;
-The Queen of the seventh column is in row 2;
-The Queen of the eighth column is in row 4;

In the attached guide app shows the game console and various tips for the search for solutions.