One of my online chess games. Some annotations below . . .
4. Nxe5?! I never saw this before in a Four Knights Game but it actually has a name: the Halloween Gambit. In exchange for a knight, White gets to chase black knights around the board with pawns.
9. …c6? This is not such a good move if White had played 10 h4 because the knight at g6 doesn’t have many options. Instead, 9 …cxd6 10 exd6 Qf6 11. Qe2+ Qe6 12. Nb5 Qxe2+ simplifies with a material advantage.
11. Nxb5? Just backing the bishop up to d6 looks better.
14. …a5? White could have played 15 Bd2 attacking the pawn.
15. …Nh6? This gives White time to play 16. Be3 (which he doesn’t) and cut off the diagonal to his king so Black can’t play 16. …Qb6+, which I should have played this move.
16. f5?? I’m going to give that two question marks because I think it’s pretty much over now.
16. Qd5? 16. …Bxh6 gives Black one less piece to attack with.
22. f6? I don’t know if it makes sense to hand out question marks in a completely lost game but 22. Rae1 is an obvious move here.
22. fxg7? There aren’t any good moves left. This leads to a forced mate.
25. hxg4 Or 25. Kg3 Qf2+ 26. Kxg4 Be2+ 27. Qxe2 h5+ 28. Kg5 Qf6#.