[FEN "r2k1b1r/p3pp2/2Q5/8/3P3p/q3P3/P2N1PPB/5RK1 w -"]

25. Bc7+ Kc8 26. Bb6+ Kb8 27. Qc7#


w b wb bw | w b wb bw

w     an



25. Bc7+      an



25...Kc8      an



26. Bb6+      an



26...Kb8      an



27. Qc7#      an