Lesson
White to move. Main line: 1. e4 Kd6 2. Kd4 Ke6 3. e5 Ke7 4. Kd5
White’s winning plan is not to push the pawn — it is to escort it with the king. The king must reach one of the key squares in front of the pawn, and the tool for that is the opposition: placing your king directly opposite the enemy king so that any move it makes gives ground.
Notice how White advances the pawn only when it comes with tempo or when the king has already secured the squares ahead. Rushing e4-e5-e6 without king support lets Black hold the draw by keeping the opposition himself.
This is a position every improving player should be able to win blindfolded — and a great one to share as an interactive replay, because the point only becomes visible when you step through the king moves.