Chess puzzle (Advantage)
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Be3 e5 7. Qd2 Nf6 8.
f3 b6 9. Nc3 Bd7 10. O-O-O Be7 11. Bc4 O-O 12. g4 Rc8 13. Bb3 Be6 14. Nd5 Bxd5
15. Bxd5 Qc7 16. Bb3 a5 17. a4 Qc6 18. Kb1 b5 19. axb5 Qxb5 20. h4 Nd7 21. g5
Nc5 22. Bxc5 Rxc5 23. g6 hxg6 24. Rhg1 a4 25. Ba2 a3 26. Bb3 Ra8 27. Rxg6 a2+ *
Position (FEN): r5k1/4bpp1/3p2R1/1qr1p3/4P2P/1B3P2/pPPQ4/1K1R4 w - - 0 28
White to move.
Themes: Defensive Move, Pin Middlegame  
Puzzle rating: 1754
Best move: Ka1