Chess puzzle (Advantage)
Opening: Benko_Gambit, Benko_Gambit_Other_variations
Moves: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. b3 d6 5. e3 g6 6. Nf3 Bg7 7. Bb2 O-O 8. Be2 bxc4
9. bxc4 Ba6 10. Nbd2 Nbd7 11. O-O Nb6 12. Rc1 Nfd7 13. a4 *
Position (FEN): r2q1rk1/p2nppbp/bn1p2p1/2pP4/P1P5/4PN2/1B1NBPPP/2RQ1RK1 b - - 0 13
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1155
Best move: Bxb2