Which character does Ron play in the game of chess in the first book?

In "Harry Potter and the Sorcerer's Stone," Ron plays the knight in the life-sized Chess game that Harry, Hermione, and he must navigate to reach the Philosopher's Stone. His strategic skills as a chess player are crucial for guiding his friends through the challenges of the game, showcasing his intelligence and bravery. Ron's role as the knight also symbolizes his willingness to sacrifice for his friends, ultimately leading to their victory.