[FEN "r4rk1/2p2p2/p3ppbp/1p6/2nP3P/P1P1P1N1/B2K1PP1/R6R w -"]

19. Bxc4 bxc4


w b wb bw | w b wb bw

w     an



19. Bxc4      an



19...bxc4      an