Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Three_Knights_Game
Moves: 1. Nf3 Nf6 2. Nc3 e5 3. e4 d6 4. d4 exd4 5. Nxd4 Bg4 6. f3 Bh5 7. Bg5 Be7 8.
Bc4 O-O 9. O-O Nxe4 *
Position (FEN): rn1q1rk1/ppp1bppp/3p4/6Bb/2BNn3/2N2P2/PPP3PP/R2Q1RK1 w - - 0 10
White to move.
Themes:  Opening  
Puzzle rating: 1014
Best move: Bxe7