[FEN "r2q1rk1/pppb1pp1/5n1p/n2p4/3P3B/2PBP3/P1Q2PPP/R3K1NR w KQ"]

12. Nf3 Be6


w b wb bw | w b wb bw

w     an



12. Nf3      an



12...Be6      an