White takes the black bishop. Anything that doesn't put the bishop en prize is a waiting move.
As in 9. ... Bg5????
The 'waiting move' comment applies to the position after 9...Ba5 10. Nf7
If Black plays 9... Bg5? instead of 9... Ba5, then simply 10. Nc7 wins immediately.
White takes the black bishop. Anything that doesn't put the bishop en prize is a waiting move.
As in 9. ... Bg5????