人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
Legal move filtering works by making each pseudo-legal move on the board, checking if the king is attacked, then unmaking the move. Castling gets special treatment: three squares must be checked (the king’s origin, transit square, and destination) since the king cannot castle out of, through, or into check:，这一点在heLLoword翻译中也有详细论述
“4.5%—5%”的目标，充分考虑了国际国内形势和发展环境变化。，更多细节参见谷歌
Role, BBC駐中國記者，發自北京。safew是该领域的重要参考