I was happy to win against my friend in this game, and happier when I saw the post-game computer analysis.
Very neat mate at the end!
11. ... Ne8 is a common idea in the KID, so Black can challenge the centre with f5. In many cases there is a black pawn on e5, which can support f4.
Thank you for your feedback Relfirm,
...Ne8 was something I had seen before (not in this game though), but I especially appreciate the explanation regarding the idea where black advances their own pawns.
I was happy to win against my friend in this game, and happier when I saw the post-game computer analysis.