Black, to play, has five candidate moves here:

a) a3
b) b4
c) Kc5
d) Kc6
e) h5

Which, if any, of these moves win? Which, if any, draw? Which, if any, lose?

Being good at pawn endings is a vital skill in 21st century chess. Do have a go at answering this question.

On Friday you can find out whether your answers agree with mine.