Course Hero. "Ready Player One Study Guide." Course Hero. 14 June 2017. Web. 15 Oct. 2018. <https://www.coursehero.com/lit/Ready-Player-One/>.
Course Hero. (2017, June 14). Ready Player One Study Guide. In Course Hero. Retrieved October 15, 2018, from https://www.coursehero.com/lit/Ready-Player-One/
(Course Hero, 2017)
Course Hero. "Ready Player One Study Guide." June 14, 2017. Accessed October 15, 2018. https://www.coursehero.com/lit/Ready-Player-One/.
Course Hero, "Ready Player One Study Guide," June 14, 2017, accessed October 15, 2018, https://www.coursehero.com/lit/Ready-Player-One/.
During Latin class Parzival is reminded of the clue about the Copper Key, and he suddenly realizes the key is probably hidden on Ludus, the planet where he goes to school. He is shocked by this realization but then decides that James Halliday probably "wanted a schoolkid to find" the Copper Key. Using image-recognition software and the OASIS atlas, Parzival scans the surface of Ludus for a location matching the entrance to the Tomb of Horrors from the old Dungeons & Dragons module. He realizes it is located in the forest near a different school on the opposite side of the planet. The school offers free transportation vouchers for students to attend sporting events at different schools. Using one of these vouchers, Parzival teleports to the school near the tomb. From there he runs into the surrounding forest, finds the tomb's entrance, and goes in.
Parzival isn't specifically trying to solve the clue when he figures out its location. As he relaxes his mind in a dull Latin class, his brain makes the connection, and his extensive knowledge of Halliday keeps him from second-guessing his intuition. It makes sense that Halliday would put the key on planet Ludus since he personally coded and established the school system there. Throughout his life Halliday was obsessively nostalgic for his own youth—another reason he would put the key in reach of a schoolkid.