Chess puzzle (Advantage)
Opening: Horwitz_Defense, Horwitz_Defense_Other_variations
Moves: 1. d4 e6 2. e3 d5 3. Nf3 c5 4. c3 Nc6 5. Nbd2 Nf6 6. a3 Qb6 7. b3 cxd4 8. cxd4
Bd6 9. b4 O-O 10. Bb2 Ne4 11. Bd3 Nxb4 *
Position (FEN): r1b2rk1/pp3ppp/1q1bp3/3p4/1n1Pn3/P2BPN2/1B1N1PPP/R2QK2R w KQ - 0 12
White to move.
Themes:  Opening  
Puzzle rating: 1716
Best move: axb4