King and Pawn Versus King Endgame - Opposition

Opposition

a b c d e f g h
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
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White wins by simply marching to a key square via c5. Taking the opposition only draws.

The second concept needed is opposition – when two kings face each other with only one square in between, the side with the move may have to move the king away and allow the opposing king to advance. The other king has the opposition.

However, Averbakh pointed out that the opposition is a means to an end; the end is penetration to a key square. If you can penetrate without the opposition, then do so. In this diagram, White should seize a key square by playing:

1. Kc5

and moving to a key square on the next move (e.g. 1... Kd7 2. Kb6). Taking the opposition by 1. Ke4 draws (as do any other moves).

Read more about this topic:  King And Pawn Versus King Endgame

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