Taiko Meijin's Shogi Board (Checkmate) Conan and Yumi visit the apartment where Hideyoshi is holding a Shogi study group, and find one of the participants, Yasuaki Genda, murdered there. A Shogi board with two legs cut off was found next to him. In addition, the house of Yuhei Kishimoto, who was also a participant in the study group, burns down and his body is found. There was a Shogi board with three legs cut off. Meanwhile, criminals kidnap Hideyoshi. He noticed something in the kitchen when Genda's body was found and went to see the murderer to encourage him to turn himself in...