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8 queens puzzle
![8 queens puzzle](https://media.9game.cn/gamebase/20230730/3/19/469ee348f9804f45a0222185e9268ac4.jpg?x-oss-process=image/resize,w_120,m_lfit)
8 Queens puzzle is an application for persons who loves use their brain, you will discover a problem proposed for the first time in 1848 that has interested many mathematicians and chess players. Some variations are implemented with other pieces for more entertainment. keyword : chess, puzzle