How to generate a mask for knight?

Question

I'm using bitboards to implement a chess program. My question is basically when I move a knight, it's mask has to be modified to get the legal moves. Is there an elegant way for it, I was thinking about shifting bits but that seems to be a bad way.

Answer 1

由于棋盘上只有64个方格，你可以简单地预先计算所有骑士的动作。在搜索本身中，您可以通过一次表查找找到骑士的攻击。<​​/ p>

表本身只需要512个字节（64 * 8个字节）。

最初填写表格并不是时间关键，因此算法的选择并不重要，只要它提供正确的正方形。