Let's consider the rules relating to net kills, when the shuttle is very tight to the net. I don't believe this has been completely discussed here before. I've made some illustrations to help make the discussion clear. In these pictures, there is a translucent red surface that extends upwards from the net. Think of it as an imaginary boundary line, that shows whether an object is on your side of the net. We all know that it is illegal to strike the shuttle on your opponent's side of the net: Situation 1 - illegal contact Obviously it's legal to strike the shuttle on your side of the net, even if some other part of the shuttle is still on your opponent's side: Situation 2 - legal contacts We also know that it's legal to follow through your stroke over the net, provided that the intial point of contact was on your side: Situation 3 - a legal follow through There's one more possible situation, however. Is it legal to strike the shuttle with part of your racket (the top of the head) intruding into your opponent's court? The point of contact is in your court, but part of your racket is not. Situation 4 - is this legal? Let's look at the relevant laws from section 13: So what do you think? I'm inclined to think this ought to be legal, but it's not clear to me what the laws say about it. It rather depends on how strictly "invading the opponent's court" is interpreted.