Fundamentals (part four)

Spanton (161) - Robert Newton (161)
Highbury (London) Rapidplay 1989

White has just made a capture on c5 ... who stands better?

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Material is equal, and so is the position - but a modicum of care is required from both sides as there are several only-moves before the end.
51...Ke5
Clearly an only-move - the c pawn must be stopped.
52.Ke3 f4+ 53.Kf3
Also an only move as 53.Kd3?? loses to 53...Kd5 followed by capture of the c pawn.
53...g5
Again an only-move since now 53...Kd5?? loses to 54.Kxf4 Kxc5 55.Kg5 etc.
54.a5
Anything else loses, eg 54.g3? g4+! (not 54...fxg3 as 55.a5! Kd5 56.a6 Kc6 57.Kxg3 draws) 55.Kf2 fxg3+! (not 55...f3 as 56.a5 draws) 56.Kxg3 Kd5, when Black picks up the white queenside pawns,while White cannot capture on h4 because the g pawn will queen.
54...g4+
Also drawing is 54...Kd5 55.a6 Kc6 56.Ke4 h4 as 57.Kf5?? loses to 57...h3 or 57...f3.
55.Kf2 Kd5
The only move as 55...g3+?? loses to 56.Kf3 Kd5 57.a6 Kc6 58.Kxf4 etc.
56.Ke2??
Only 56.a6 draws.
56...h4??
Winning is 56...Kxc5, eg 57.Kd3 h4 58.Ke4 h3 59.gxh3 gxh3 60.Kf3 Kb5 etc.
57.a6
Now the draw is back on.
The game finished:
57...Kc6 58.Kf2 Kc7 59.Ke2 Kc6 ½–½