Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_OKelly_Variation
Moves: 1. e4 c5 2. Nf3 a6 3. a4 Nc6 4. c3 d6 5. d4 cxd4 6. cxd4 Nf6 7. Bd3 Qb6 8. O-O
Nxd4 *
Position (FEN): r1b1kb1r/1p2pppp/pq1p1n2/8/P2nP3/3B1N2/1P3PPP/RNBQ1RK1 w kq - 0 9
White to move.
Themes:  Opening  
Puzzle rating: 1691
Best move: Nxd4