Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Closed
Moves: 1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Nf3 a6 5. d4 cxd4 6. Nxd4 Bc5 7. Nf3 d6 8. Be2
Nf6 9. a3 Qa5 10. Bd2 Qc7 11. b4 Nxb4 *
Position (FEN): r1b1k2r/1pq2ppp/p2ppn2/2b5/1n2PP2/P1N2N2/2PBB1PP/R2QK2R w KQkq - 0 12
White to move.
Themes:  Opening  
Puzzle rating: 1070
Best move: axb4