Chessboard Chamber

The Giant Wizard's Chess set was a chess set transfigured by Professor McGonagall to giant size. It was used to guard the Philosopher's Stone in the 1991–1992 school year.

On 4 June 1992, Harry Potter, Ron Weasley and Hermione Granger were attempting to prevent the theft of the Philosopher's Stone by a servant of Lord Voldemort that, at the time, they believed was Severus Snape. After making their way past the Stone's first three defences, they encountered this obstacle in the fourth chamber. Ron took command of the black side, with himself, Harry, and Hermione replacing missing pieces, in order to defeat the obstacle and be allowed to pass. In the end, Ron sacrificed himself to the white Queen to allow Harry to checkmate the opposing King.

At the end of year feast, Albus Dumbledore awarded Ron fifty house points for "the best played game of chess that Hogwarts has seen these many years". Percy Weasley proudly boasted about his brother's accomplishment.

Behind the scenes

 * In Lego Harry Potter: Years 1-4, Ron trips over a chess piece's sword, falls unconscious, and is unable to follow his friends.
 * In Harry Potter and the Philosopher's Stone the film version, Ron is actually riding the black knight instead of just taking it's place on the board.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter and the Philosopher's Stone (video game)
 * Lego Harry Potter: Years 1-4