Which epilogue for this game ?

White To move




















After 54) g7 + which states the obvious
Black had an optical illusion and played Rxg7 ( Kh7 ! works well since the c3 pawn holds the position )
55) hxg7 kxg7
56) Nf5+ Kf6
57) Ne3 Ke5
58) a4 Kd4
59) Nc2 Kc4
60) a5! the only way Kb3
61) b5 Kc2
62) bxa6 1-0