Fundamentals (part 44)

Spanton (1969) - Kenneth Norman (2147)
Guernsey 2016

Black has just captured on e8 - who stands better?

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White is winning.
35.bxa5 bxa5
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36.c4??
This turns a win into a loss. Correct is 36.a4 b4 (if 36...bxa4 then 37.c4 creates a protected passed pawn) 37.Kb3 Kd7 38.Kc4 Kd6 39.f4 etc.
36...bxc4 37.Kc3 Kd7 38.Kxc4 Kd6 39.g3 a4 40.Kb5 Kxd5 41.Kxa4 c4 42.Kb4 Kd4 0-1