Chess puzzle (Advantage)
Opening: Vant_Kruijs_Opening, Vant_Kruijs_Opening_Other_variations
Moves: 1. e3 e5 2. d3 Nf6 3. h3 Nc6 4. a3 Bc5 5. b4 Bb6 6. Bb2 d6 7. g3 h6 8. Bg2 Bd7
9. Nd2 a6 10. Nb3 Be6 11. Nd2 d5 12. Ne2 g5 13. e4 d4 14. g4 Qe7 15. Ng3 Nxb4 *
Position (FEN): r3k2r/1pp1qp2/pb2bn1p/4p1p1/1n1pP1P1/P2P2NP/1BPN1PB1/R2QK2R w KQkq - 0 16
White to move.
Themes:  Middlegame  
Puzzle rating: 1303
Best move: axb4