Chess puzzle (Advantage)
Opening: Four_Knights_Game, Four_Knights_Game_Italian_Variation
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Bc5 5. a3 O-O 6. O-O Nd4 7. Nxe5 c6 8. b4
Bb6 9. Nf3 d5 10. exd5 cxd5 11. Ba2 *
Position (FEN): r1bq1rk1/pp3ppp/1b3n2/3p4/1P1n4/P1N2N2/B1PP1PPP/R1BQ1RK1 b - - 1 11
Black to move.
Themes:  Opening  
Puzzle rating: 1767
Best move: Bg4