Defeating a better player

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Tajamoen

I'm always more focused when I play against a higher-rated player, hoping that I win. And sometimes, I win! This is my best win so far. Did I play very well or was it luck that leaded me to victory? Please tell me what he did wrong and enjoy the game!

mishan

11. B:e6 !! with attacking to f7 maybe played

gerram

I think 17. ...Qf4+ could give black not bad chances for counterattack

gerram

I think 17. ...Qf4+ could give black not bad chances for counterattack