[FEN "2r2rk1/5pp1/p4q1p/1pPR4/5P2/1QP1P3/P4P1P/5RK1 b -"]

21... Qg6+ 22. Kh1 Qe4+ 23. Kg1


w b wb bw | w b wb bw

b     an



21...Qg6+      an



22. Kh1      an



22...Qe4+      an



23. Kg1      an