Chess puzzle (Equality)
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qd2 b5 8.
O-O-O Bb7 9. f3 Nf6 10. Kb1 Bb4 11. g4 Ne5 12. Be2 Rc8 13. Ndxb5 *
Position (FEN): 2r1k2r/1bqp1ppp/p3pn2/1N2n3/1b2P1P1/2N1BP2/PPPQB2P/1K1R3R b k - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1584
Best move: axb5