I Carry Out Destiny in the Chess Game

All living things are like chess, and the heaven and earth are like boards. Lu Chen was supposed to die in an arranged "final battle". But when the black chess piece that shouldn't exist fell into his palm, he suddenly realized that he was not a chess piece. He is a variable. Variables cannot be left, and the ending cannot be changed. The judge sits high in the sky and determines the number of lives of all people with the final battle of nine steps. What Lu Chen has to do is to survive the chessboard, tear apart the final battle, break up the chessboard, and see who is playing chess outside this world. If the number of lives has already been written down. Then he would start from this game and change his destiny.