"Now what do we do?" Harry whispered.

"It's obvious, isn't it?" said Ron. "We've got to play our way across the room."

Behind the white pieces they could see another door. "How?" said Hermione nervously.
"I think," said Ron, "we're going to have to be chessmen."

He walked up to a black knight and put his hand out to touch the knight's horse. At once, the stone sprang to life. The horse pawed the ground and the knight turned his helmeted head to look down at Ron.

"Do we -- er -- have to join you to get across?" The black knight nodded. Ron turned to the other two.

"This needs thinking about he said. I suppose we've got to take the place of four of the black pieces...."

Harry and Hermione stayed quiet, watching Ron think. Finally he said, "Now, don't be offended or anything, but none of you are that good at chess --"

"We're not offended," said Harry quickly. "Just tell us what to do."

"Well, Harry, you take the place of that bishop, and Hermione, you go next to him instead of that castle, and Amelia you replace that pawn."

"What about you?"
"I'm going to be a knight," said Ron.

The chessmen seemed to have been listening, because at these words a knight, a bishop, a pawn, and a castle turned their backs on the white pieces and walked off the board, leaving three empty squares that Harry, Ron, Hermione, and Amelia took.

"White always plays first in chess," said Ron, peering across the board. "Yes... look..."

A white pawn had moved forward two squares.