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Eight the empress problems are old but famous a thou problems, is the typical model example that returns to trace calculate way.The problem is a famous mathematician Gauss to put forward in 1850 in 19th century:Put eight empresses on the international Chin chess of 8 X8 spaces, make it not the ability is mutual to attackstone, namely arbitrarily two empresses can not be placed in the same line, the same row or the same oblique line up, ask how much kind put a method.The origin code helps to solve eight an empress problem