Introduction - If you have any usage issues, please Google them yourself
8 Queen s problem is an ancient and well-known problems, backtracking algorithm is a typical example. The problem is that the nineteenth century, the famous mathematician Gauss in 1850: Under the 8x8 grid on the display of the chess Queen eight, making it unable to attack each other, that is, any two can not be Queen s in the same line, the same row or the same slash on, asking how many kinds of pendulum method.