Chess puzzle (Advantage)
Opening: Pirc_Defense, Pirc_Defense_Kholmov_System
Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. Bg5 c5 6. dxc5 Qa5 7. Bxf6 Bxf6 8.
Ne2 Qxc5 9. Bb3 Bg4 10. Qd3 Bxe2 11. Nxe2 Bxb2 12. Rb1 Bg7 13. Bd5 Nc6 14. O-O
O-O 15. Rxb7 Rfb8 16. Rfb1 Nb4 17. Qb5 Rxb7 *
Position (FEN): r5k1/pr2ppbp/3p2p1/1QqB4/1n2P3/8/P1P1NPPP/1R4K1 w - - 0 18
White to move.
Themes:  Middlegame  
Puzzle rating: 1660
Best move: Qxb7