If Black play he moves into 6 or 24. White has the choice of two moves only, either of the double corners.

Black.White.
19to245to1
18to151to5
10to6

Now, whether White move from 5 to 1 or from 32 to 28, he must submit to an exchange, for Black backs up his king, takes one for one, and then wins in the usual way.

Suppose White has the move. He can only go into squares 1 or 32. Say he moves into 32; Black has only to go from 18 to 15, and what has his adversary left? Nothing but to submit to an exchange at the next move, after which the rest is easy, as already shown with two kings to one.

FOUR KINGS TO THREE.

As a rule the player with the superior force must win, but in some positions it is very difficult to force an exchange. Take this:—

White, with the move, has but one square, 28, into which he can move. Black, with the move, would of course win by going into the same square, and soon compel an exchange. Suppose White move—

White.Black.
32to2824to20
28to3223to19
31to2722to18
27to31

If he play 27 to 23 his adversary takes from 18 to 27, and leaves himself after the exchanges with two kings to one. White prolongs the struggle by moving from 27 to 31, to which Black replies by playing