Chess puzzle (Equality)
Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Bc4 e5 5. d3 Nc6 6. Bd2 Nf6 7. Nf3 Bg4 8.
Nd5 Bb4 9. Nxb4 Nxb4 10. a3 Nxd3+ 11. Bxd3 Qb6 12. Qe2 O-O 13. O-O *
Position (FEN): r4rk1/ppp2ppp/1q3n2/4p3/6b1/P2B1N2/1PPBQPPP/R4RK1 b - - 4 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 2061
Best move: e4