Why does Yahweh yield to Satan in the book of Job?

Without further ado Job is robbed of his herds, his servants are slaughtered, his sons and daughters are killed by whirlwind, and he himself is smitten with sickness and ought to the brink of the grave. To rob him of peace together, his wife and his old friends are let loose against m, all of whom say the wrong things. His justified com�plaint finds no hearing with the judge who is so much raised for his justice. Job's right is refused in order that Satan be not disturbed in his play.