Which is harder: devising an unsolvable problem, or solving that problem? Ishigami to Yukawa in The Devotion of Suspect X by Keigo Higashino

A divorced woman, Yasuko Hanakoa, along with her daughter Misato, accidentally murders her ex-husband Togashi. Tetsuya Ishigami, their neighbour, a brilliant mathematician having unrequited romantic feelings for Yasuko, offers to help her cover up the crime. He comes-up with a near perfect plan to dispose the body, leaving the police completely clueless about the crime. Continue reading →