[FEN "4rk1r/ppqn1pp1/2p2np1/3p4/1P1P4/P1NBPQ1P/5PP1/R3K2R w KQ"]

16. g4 Rh4


w b wb bw | w b wb bw

w     an
    


16. g4      an
    


16...Rh4      an