The Falkbeer Counter-Gambit is one of the most aggressive openings for black. It is a direct counter attack against the King's Gambit of white. One of the great things about this counter is that it destroys all the lines that a king's gambit player may have planned on using. There are also lots of traps that white will have to look out for as his king is very exposed even after the second move.
1. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. d3 Bb4 6. Bd2 e3
7. Bxe3 O-O 8. Bd2 Bxc3 9. bxc3 Re8+ 10. Be2 Bg4 11. c4 c6
12. dxc6 Nxc6 13. Kf1 Rxe2 14. Nxe2 Nd4 15. Qb1 Bxe2+ 16. Kf2
Ng4+ 17. Kg1 Nf3+ 18. gxf3 Qd4+ 19. Kg2 Qf2+ 20. Kh3 Qxf3+
21. Kh4 Nh6 22. Qg1 Nf5+ 23. Kg5 Qh5# 0-1