Chess puzzle (Advantage)
Moves: 1. e4 e5 2. d4 exd4 3. Qxd4 d6 4. Nc3 Nc6 5. Qd3 Nf6 6. f3 Be6 7. Bg5 Be7 8.
O-O-O O-O 9. Kb1 Nb4 10. Qd2 Bxa2+ 11. Nxa2 Nxa2 12. Kxa2 Qd7 13. Kb1 Qa4 14.
Qc3 h6 15. Bh4 Nxe4 16. fxe4 Bxh4 17. g3 Bf6 18. Qc4 Qa5 19. Bd3 b5 20. Qxb5
Qxb5 21. Bxb5 Rab8 22. c4 a6 23. Bxa6 *
Position (FEN): 1r3rk1/2p2pp1/B2p1b1p/8/2P1P3/6P1/1P5P/1K1R2NR b - - 0 23
Black to move.
Themes: Queenside Attack Middlegame  
Puzzle rating: 565
Best move: Rxb2+