Chess puzzle (Advantage)
Opening: London_System, London_System_Other_variations
Moves: 1. Nf3 Nf6 2. d4 g6 3. Bf4 Bg7 4. e3 O-O 5. Bc4 d5 6. Be2 c5 7. c3 Nc6 8. Nbd2
Bf5 9. O-O Re8 10. Qb3 b6 11. Bb5 Na5 12. Qa4 Rf8 13. dxc5 bxc5 14. b4 Nb7 15.
Bc6 Qb6 16. b5 a6 17. c4 Bd3 18. Bxb7 *
Position (FEN): r4rk1/1B2ppbp/pq3np1/1Ppp4/Q1P2B2/3bPN2/P2N1PPP/R4RK1 b - - 0 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1843
Best move: Qxb7