Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Knight_Variation
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. Be2 Nf6 5. O-O Bd6 6. d3 O-O 7. c4 Re8 8. h3
Qe7 9. Re1 Bb4 10. Nc3 c6 11. a3 Ba5 12. b4 Bxb4 *
Position (FEN): rnb1r1k1/pp2qppp/2p2n2/3p4/1bP5/P1NP1N1P/4BPP1/R1BQR1K1 w - - 0 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1522
Best move: axb4