[JoshTriplett]

> - max of 9 relevant occupancy bits for a bishop - how? A bishop on e4 for example would have to check b1,c2,d3,f5,g6,h7 and a8,b7,c6,d5,f3,g2,h1 for a total of 13 bits. Similar mistake for a the rook.

If I'm understanding correctly: it's trivial to use a mask with the occupancy bitmap for white/black to eliminate moves atop your own pieces, and generate captures for moves atop your opponent's pieces. The sliding move handling needs to look up whether a piece is in the way of your destination. So, the sliding move handling doesn't need to handle spaces on the edge of the board, because they'll never be in the way of another square.

[harerazer]

This makes a lot of sense and gives context to the assumption that we only need to handle the case where an opponent's piece is in the way. Would be great if the author took the 2 sentences to explain this near the beginning of the article.