Chess puzzle (Advantage)
Opening: Nimzo-Larsen_Attack, Nimzo-Larsen_Attack_Modern_Variation
Moves: 1. b3 e5 2. Bb2 Nc6 3. g3 d5 4. Bg2 Nf6 5. Nf3 b6 6. Nxe5 Nxe5 7. Bxe5 Bb7 8.
e3 Bd6 9. Bxd6 Qxd6 10. d4 O-O 11. O-O Rac8 12. Nc3 c5 13. Nb5 Qd7 14. Nxa7 *
Position (FEN): 2r2rk1/Nb1q1ppp/1p3n2/2pp4/3P4/1P2P1P1/P1P2PBP/R2Q1RK1 b - - 0 14
Black to move.
Themes:  Middlegame  
Puzzle rating: 1537
Best move: Ra8