8.47 Two players, A and B, take turns placing chess pieces "knights" on the squares of a chessboard: A starts and places a white knight each time, while B places a black knight each time. Each knight must be placed on an empty square, which can be either a white or a black square, but it must be placed in such a way that the knight cannot be captured by the opponent. The player who first cannot place a knight according to the rules loses. Under correct strategy, who will win? Explain your reasoning.
[B solution] B will win. B just needs to place the black horse in the square that is symmetric to the square where A just placed the white horse, relative to the center of the board. This way, the black horse will be on the same color square as the white horse, and thus will not be captured.