Hermione put the chessboard away after making sure all of the pieces were going to stay in place, not at all disappointed to see it put out of action.
Taking the two pieces they needed from Ron, she headed back out into the living room to find the right book. She thought she remembered the incantation correctly, but it never hurt to double check.
Pulling out the book she needed, Hermione sat down cross-legged on the floor and turned to the correct page. Putting her own pawn down for a moment, she picked up Ron's one and cast the initial part of the charm, before casting the second part to link the pieces together. Or she hoped she did, anyway.
Holding the white pawn up to him, she held onto hers. "Try it," she told him.