The Pawn Is Mightier Than The Sword


I dont know whether you sacrifised soo many ,or did a mistake,,
but I would not have done that..
advice: try playing tough opponents, you will learn more

3. ... exd4 overlooks that white could play 4. Qh5+ g6 5. fxg6 and it looks like black is in big trouble. Your opponent missed this.
5. ... c5 attacking the queen looks like a mistake. Harassing the early development of the queen is only a good idea if the move helps your position in other ways. In this case, the pawn on c5 just blocks your dark squared bishop.
9. ... Bd7 allowed your opponent to play 10. Bd6, lucky for you your opponent overlooked that idea.
14. ... c4. I know you are very proud of this pawn placement later, but this is really a terrible move. The fact that white allowed your checkmate later doesn't make this a good move. You allowed your opponent to take a rook for free! You should have taken your piece back with 14. ... Nxe7. Notice that if white takes your knight 15. Qxe7 you play Re8 winning the queen.