Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 e5 2. Nf3 d6 3. Bc4 h6 4. h3 Nf6 5. Nc3 a6 6. a3 c5 7. d3 Nc6 8. Nd5 Be7
9. c3 Rb8 10. Qa4 *
Position (FEN): 1rbqk2r/1p2bpp1/p1np1n1p/2pNp3/Q1B1P3/P1PP1N1P/1P3PP1/R1B1K2R b KQk - 2 10
Black to move.
Themes:  Opening  
Puzzle rating: 1196
Best move: b5