How to Play Nd6 Castle

Bc5, F6, Nd4, Cd4, Bc1 is the correct way to play. I couldn't figure this out over the board, so I played Nd5. You're a piece out, but you might get check-made it in the next five moves. So you play Nd6, which is like a... It's a bad move, but it's not easy to refute anyway. Instead I decided to be subtle, H3, what I was doing,. Kh8, good move. A4, f6, N3, Ng8, Nd5, Ng7. The position goes into complete madness and then back again