Chess puzzle (Advantage)
Opening: Grunfeld_Defense, Grunfeld_Defense_Russian_Variation
Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 c6 7. e4 b5 8. Qb3
Be6 9. Qc2 O-O 10. Be2 Na6 11. a3 Qa5 12. Bd2 b4 13. Na4 Nxe4 14. axb4 Nxb4 15.
Qc1 Nxd2 16. Nxd2 Bxd4 17. O-O Bg7 18. Nc5 Bxb2 *
Position (FEN): r4rk1/p3pp1p/2p1b1p1/q1N5/1n6/8/1b1NBPPP/R1Q2RK1 w - - 0 19
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1653
Best move: Rxa5