Chess puzzle (Advantage)
Opening: Alekhine_Defense, Alekhine_Defense_Four_Pawns_Attack
Moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. f4 g5 6. Nf3 h6 7. Bd3 g4 8. Nh4 h5
9. O-O e6 10. g3 d5 11. c5 Nc4 12. Bxc4 dxc4 13. Qc2 *
Position (FEN): rnbqkb1r/ppp2p2/4p3/2P1P2p/2pP1PpN/6P1/PPQ4P/RNB2RK1 b kq - 1 13
Black to move.
Themes:  Opening  
Puzzle rating: 914
Best move: Qxd4+