Even in King and Pawn endings, concentration is needed until the end of the game. It is very easy to play a move which can lose a game which could have been won, or allow your opponent to get a result he should not have got.
In this week’s problem, White is winning. But how does he do that? And what tempting move only draws the game?
The solution to last Monday’s problem is that after 1. g4 hxg4? , White can draw with 2. Kh8 h3 3. a7 and any pawn move by Black puts White in stalemate, so Black has to play 3… Kb6 4. Kb8 and White can Queen his pawn and then give perpetual check.