Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Four_Knights_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Nxc6 bxc6 7. Bg5 Be7 8.
Be2 d6 9. O-O Bb7 10. Re1 h6 11. Bh4 g5 12. Bg3 e5 13. Bf1 Qb6 14. Na4 Qb4 15.
c3 Qa5 16. b4 Qc7 17. Qb3 Rb8 18. Bc4 d5 *
Position (FEN): 1r2k2r/pbq1bp2/2p2n1p/3pp1p1/NPB1P3/1QP3B1/P4PPP/R3R1K1 w k - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1246
Best move: exd5