'null_frac', 0.0::real,
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:。新收录的资料对此有专业解读
，推荐阅读新收录的资料获取更多信息
Metro-style apps have room to breathe. They’re not about the chrome, they’re about the content. […] For years, Windows was always about adding stuff. We added bars, and panes, and doodads, and widgets, and gadgets, and bars — and stuff everywhere. And that’s how we defined our U.I., based on what new widgets we added. Now, we’ve receded into the background, and the app is sitting out there on the stage.，这一点在新收录的资料中也有详细论述
Set compiler, g++ example
В КСИР выступили с жестким обращением к США и Израилю22:46