Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Delayed_Alapin
Moves: 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. d3 e5 5. Be2 Be7 6. O-O Nc6 7. h3 h6 8. a4 O-O
9. Nh2 Be6 10. f4 d5 11. f5 Bd7 12. Bf3 c4 13. exd5 Bc5+ 14. Kh1 Ne7 15. dxc4
Nxf5 16. Qe1 Re8 17. b4 Bd6 18. c5 *
Position (FEN): r2qr1k1/pp1b1pp1/3b1n1p/2PPpn2/PP6/2P2B1P/6PN/RNB1QR1K b - - 0 18
Black to move.
Themes:  Opening  
Puzzle rating: 1613
Best move: e4