The London endgame

Yesterday I started to play in an International Master tournament in Budapest, Hotel Berlin. My first opponent was a young indian player rated 2281. After my last tournament which was the worst of my life I can remember. I hope to do much better this time.

I played the London system and my opponent exchanged the queens on move 5. He sacifice a pawn for activity. After a long defense, we got an interesting edngame knight and bishop versus rook. with many mistakes on both sides I was able to win at the end: