Place 8 Queens on an 8X8 board so that none can attack another. When you place a Queen, the squares under attack are colored reducing the search space. You can undo a step and backtrack by pressing key "z" . Good luck. You can post your solutions in the comments indicating the locations of the Queens, such as A7, B1, etc.
Thanks to whitakerk whose project gave me this idea. This is the famous 8 Queens puzzle that challenged even the great mathematician Gauss. There are 92 possible solutions even though only 12 of them are fundamental (independent under rotations and reflections) 8 Queens was one of the first serious computer programs I wrote in the days of Pascal. I remember feeling so empowered when my program produced in the late hours of the night, all the 92 solutions, even ones that eluded great Gauss. This was the moment I understood the power of computing.
