There are two methods and the combination thereof to achieve this. But because it seems easier to learn, is explained first the longest. From the diagram.

1.Th4
White boxes limit the king's enemy, now available only has rows 5, 6, 7 and 8.
1 ... RD5
the black does not want to lose it more rows without a fight, which would be the case if he played, for example: l ... Ke6. Which would be answered with 2.Th5.
2.Rf2
The king has to cooperate because the tower can not "own."
2 ... RE5 3.Rf3 RD5
If 3 ... Kf5 4.Th5 + ...

The implementation of this tea is quite complicated, here we propose a model, which is not necessarily the shortest route, but it is a surefire way to do it.
The phases are:

Placing our monarch in a central square.
Place both bishops, in boxes adjacent to each other and central. Enclosing the rival king against them.
Maneuver to force the king to put a corner.
Complete mate.

Starting position

1. Re2
He began his path toward the center.
1 ... Ke6 2.Rd3
2.Rd3 also works, but we prefer this because it does not block the path of the bishop. It is also difficult to avoid ...

The starting position would be something like this:

1.Dc6 - Cutting the boxes available to the opponent's king.
1 ... Rd3 - If 1 ... RE5 2. Qd7 cutting now in column d.
Position after 2.Dc5
2.Dc5 - The lady always puts a move by rival king's horse. Not be used to give jaques not lead anywhere.
2 ... Ke4 3.Dd6
RD5 3.Dc3 is bad for the king continues to enjoy their stay in the center. Imagine that the lady must divide the board into 4 quadrants by drawing a vertical line and a ...

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