The Alekhine Defense is a hyper modern opening in which Black allows White to get a broad pawn center and then counter-attacks it.
1. e4 Nf6
2. e5 Nd5
3. d4 d6
4. Nf3 Bg4
5. Be2 e6
6. O-O Be7
7. c4 Nb6
8. Nc3 O-O
9. Be3 d5
10. c5 Bxf3
11. gxf3 N6d7
12. f4 c6
White has a slightly better position
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1. e4 Nf6
2. e5 Nd5
3. d4 d6
4. Nf3 Bg4
5. Be2 e6
6. O-O Be7
7. c4 Nb6
8. Nc3 O-O
9. Be3 d5
10. c5 Bxf3
11. gxf3 N6d7
12. f4 c6
White has a slightly better position
More: Wiki, Chesspublishing, TCW, TCC
Play through: Chess.com, 365Chess
GM Games: Chessgames