Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Steinitz_Variation
Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Rb8 8. a4 a6
9. Qd2 Qa5 10. Kf2 b5 11. Bxb5 axb5 *
Position (FEN): 1rb1kb1r/3n1ppp/2n1p3/qpppP3/P2P1P2/2N1BN2/1PPQ1KPP/R6R w k - 0 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1370
Best move: axb5