Opposition

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5				d5 x-	e5 x-	f5 x-			5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

Direct opposition with e6 king, diagonal opposition with g2 king, and distant opposition with a4 king.

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

1.Ke5 gives white direct opposition and forces the black king backward or off the e-file.

Opposition is the act of two kings seperated by one square. Opposition can be classified into three types: direct opposition, diagonal opposition and distant opposition.

In direct opposition (when no other pieces besides the king can move), the king not to move has the advantage, as the moving king must yield at least one square in their mutual barrier to the opponent.

Diagonal opposition may be converted into direct opposition.

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