Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Nbd7 7. Bd3 e6 8. O-O
Qb6 9. Be3 Nc5 10. Nb3 Bd7 11. Na4 *
Position (FEN): r3kb1r/1p1b1ppp/pq1ppn2/2n5/N3PP2/1N1BB3/PPP3PP/R2Q1RK1 b kq - 7 11
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1588
Best move: Bxa4