A spade was now led to the nine, forcing the king.

An important move that forces the king to the edge of the board.

An important move that forces the king toward the corner.

West could then have played the jack, forcing the king.

He played the eight, forcing the king and making his slam.

In the first phase, White uses his pieces to force the black king to the edge of the board.

He then led his remaining club and the jack forced the king.

East's eight forced the king, and South was beginning to have communications problems.

Those factors have forced the king to take a balanced position to the situation.

Now there is no way to force the black king away from the c-file.