What is the difference between a Tactic and a Combination? For reference, here is a game I played as white and I think I had a nice combination from move 16, but I am not sure if it is classified as a combination or tactics. This what my thought process from move 16 was. There are probably multiple mistakes made in the game, but I am not looking for a complete analysis.
16. Bc2 - staring down the diagonal
17. Ned4 - I am hoping he will take it so I can advance my pawn to e5.
18. exd4 - He takes the sacrifice which is what I was hoping for.
19. Qxh7# - Apparently, he didn't notice the open diagonal and probably was concentrating on me attacking his bishop.
[FEN ""]
1. e4 d6 2. Nf3 g6 3. d4 Bg7 4. Be3 Nc6 5. Bb5 Bd7 6. O-O e5 7. d5 Nce7 8.
Qd3 a6 9. Bc4 b5 10. Bb3 f5 11. Nc3 f4 12. Bd2 Bf6 13. a3 Nh6 14. Ne2 g5 15.
c4 O-O 16. Bc2 Qe8 17. Ned4 exd4 18. e5 dxe5 19. Qxh7#