515 vs 2486 elo
Your opponent won easily (as expected), but you still played a great game against them; you should be happy with your game! In fact, you only made one "mistake" according to the computer and that was h4. Your opponent was just a really strong player. Even though the computer calls that move your only mistake, you were already slightly worse before then (h4 just made the downfall come a little faster). In human terms, I believe your true first mistake was not castling on move 6 (d4?! was questionable because it fights for the center before you're castled, or queenside pieces developed), but a related mistake was advancing your kingside pawns a bit too aggressively. 14. g4?! and 15. h4? were errors, but you still played a strong game for your rating. ![]()
It's a great learning experience and these two videos of mine shares why pushing those pawns was a mistake for you: