In level 24, you must use the four pieces to make a tower, then use he bishops to reach that platform on the top. Then, make another tower on the right now, so the knights to get up to the platform there too, then, make a tower using the two bishops, and then placing the knight on the to, to reach the key, now, just lead everyone to the place where the second rook is in, so make another tower to make the king able to reach that high place, and then use the knight to reach the button. And then the king can reach he king. Probably, you won't understand, you should just watch a gameplay of this level.