[FEN "r4rk1/2p2pp1/p2q3p/1p1p3b/1P1P4/P1N1P2P/2Q2PP1/R1R3K1 w -"]

21. Qf5 Bg6


w b wb bw | w b wb bw

w     an
    


21. Qf5      an
    


21...Bg6      an