Chess puzzle (Advantage)
Opening: Horwitz_Defense, Horwitz_Defense_Other_variations
Moves: 1. d4 e6 2. Nf3 d5 3. Bf4 c5 4. c3 Nc6 5. e3 Qb6 6. Na3 Qxb2 *
Position (FEN): r1b1kbnr/pp3ppp/2n1p3/2pp4/3P1B2/N1P1PN2/Pq3PPP/R2QKB1R w KQkq - 0 7
White to move.
Themes:  Opening  
Puzzle rating: 1178
Best move: Nb5