The Plate Puzzle is a puzzle that can be found in Cybil Bennett's scenario in the Silent Hill: Play Novel. It is located in Alchemilla Hospital and uses the same plates as the colored plates puzzle in Silent Hill. Solving the puzzle allows her to access the hospital.
"The chosen ones must be moved to the chosen places. Once the task is complete, the guidepost leading to chaos shall appear."
To complete the puzzle, Cybil must move the plates using the D-pad so that they are in the middle four squares.