I'm told that during an international game of chess (国际象棋), many beautiful moves could be made on a chessboard. In a decisive【C1】______ in which he was evenly matched with a Russian master【C2】______ , Marshall found his queen under serious attack. There were several ways of【C3】______ , and since the queen is the most【C4】______ piece, spectators (观众) thought Marshall would naturally move his queen to【C5】______ . Deep in thought, Marshall used all his time to consider the【C6】______ . He picked up his queen, paused, and placed it down on the most【C7】______ square of all—a square from which the queen could be【C8】______ by any one of three enemy pieces. Marshall had sacrificed (牺牲) his queen—an unthinkable move. Everyone else was【C9】______ . Then the Russian, and the【C10】______ , realized that Marshall had actually made a【C11】______ move. It was clear that no matter how the【C12】______ was taken, the Russian would soon be in a【C13】______ position. Seeing this, the Russian admitted his defeat. When spectators recovered from the【C14】______ of Marshall's daring, they showered the chessboard with money. Marshall had achieved【C15】______ in a very unusual and daring fashion—he had【C16】______ by sacrificing the queen. To me, it's not【C17】______ that he won. What counts is that Marshall had broken with standard【C18】______ to make such a move. He had looked【C19】______ the usual patterns of play and had been willing to consider an imaginative risk on the basis of his judgment and his judgment alone. No matter how the game【C20】______ , Marshall was the winner.