Loss for me
19...e5 may be OK, or 19...Qg5+ 20.Kh1 Qh4 and 21...e5.
Instead of 24...Rfb8, a better plan may be 24...bxc4 or 24...Nd4 and 25...Qf6.
Perhaps 25...bxc4 and 26...Nd4.
Instead of 26...exf4, I might have played 26...bxc4 and 27...Nd4, controlling the center and trying to get a Rook on an open file.
33...Bh3 seems to be the losing move as you give up your Knight as White plays 34.Qxb3. You don't have enough pieces on the kingside to mate. Better seems to be 33...Nd4, avoiding the loss of the Knight and staying two pawns up.
Better seems to be 33...Nd4, avoiding the loss of the Knight and staying two pawns up.
but surely white can still get the queen-rook fork?
But the bxc4 then Nd4 combination was something that seems more obvious now. I wonder why I choose against it at the time. Thank you for the help :)
You comment on some of your opponents opening mistakes, but your moves aren't aimed at exploiting those mistakes. Then on move 8, you do the same thing -- you move your knight a second time and block your bishop.
I would suggest 8. ... d5. As you note, your opponent is behind in development. Your aim should be to open the position by exchanging pawns in the center.
9. ... a6 is quite slow.
On move 15 you give up a very important bishop. If you can calculate to the end of attack, then opening the g-file is worth it. But if not, this exchange is likely not worth it.
billwall pointed out the final mistake. You let your knight get taken at move 33.
Your opponent overlooked Qb8# on moves 37 and 38.
In this game I was trying out for the Scillian Dragon for the first time and I think the opening went ok for me, but then I started losing rather badly. Where did I go wrong?