"These plugs designed with chess pieces were used together to open a door."
King/Knight/Bishop/Rook Plug is a special item in Resident Evil: The Umbrella Chronicles.
- Waples, Damien (2007). Chastain, Rebecca. ed. Resident Evil: The Umbrella Chronicles Prima Official Game Guide. Roseville: Prima.
- ↑ Waples, Prima Official Game Guide, p.112.