Detective Conan S01 E786 Taiko Meijin's Match of Love (2)

"One truth prevails."

During his Meijin title match, Haneda Shukichi receives a threatening letter from a man calling himself the Headless Shogi Player who claims to have kidnapped his girlfriend Yumi. Conan solves the second game's code and arrives at a grave on Yureizaka.