Chess puzzle (Equality)
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Qc7 7. Qd2 e5 8.
Nxc6 dxc6 9. Bc4 Bd7 10. O-O-O O-O-O 11. Bxa7 *
Position (FEN): 2kr2nr/Bpqb1pbp/2p3p1/4p3/2B1P3/2N5/PPPQ1PPP/2KR3R b - - 0 11
Black to move.
Themes:  Middlegame  
Puzzle rating: 1643
Best move: b5