Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Accelerated_Dragon
Moves: 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Bc4 O-O 8.
Qd2 Qc7 9. Bh6 Nxd4 10. Bxg7 Qxc4 11. Bxf8 Kxf8 12. e5 Nd5 13. Nxd5 Qxd5 *
Position (FEN): r1b2k2/pp1ppp1p/6p1/3qP3/3n4/8/PPPQ1PPP/R3K2R w KQ - 0 14
White to move.
Themes: Defensive Move Middlegame  Castling
Puzzle rating: 1991
Best move: O-O-O