Chess puzzle (Equality)
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6 6. Bg5 h6 7. Bxf6 Qxf6 8. e3
Ba5 9. a3 Bd7 10. b4 Bb6 11. c5 dxc5 12. dxc5 a5 13. cxb6 *
Position (FEN): r3k2r/1ppb1pp1/1Pn1pq1p/p7/1P6/P1N1PN2/2Q2PPP/R3KB1R b KQkq - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1546
Best move: axb4