Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_OKelly_Variation
Moves: 1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 e6 6. Nc3 Nf6 7. Be3 Bb4 8. f3
O-O 9. Qd2 Qc7 10. Be2 d5 11. cxd5 Nxd5 *
Position (FEN): r1b2rk1/1pq2ppp/p1n1p3/3n4/1b1NP3/2N1BP2/PP1QB1PP/R3K2R w KQ - 0 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1438
Best move: exd5