Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. dxe5 Qe7 5. Be2 Bxf3 6. exd6 Qxe4 7. gxf3 Qb4+
8. Nc3 Bxd6 9. Bb5+ c6 *
Position (FEN): rn2k1nr/pp3ppp/2pb4/1B6/1q6/2N2P2/PPP2P1P/R1BQK2R w KQkq - 0 10
White to move.
Themes:  Opening  
Puzzle rating: 1851
Best move: a3