Alexander Pichushkin — The Chessboard Killer

Alexander Pichushkin, known as the Chessboard Killer, murdered at least 49 people — and possibly as many as 63 — in Moscow's Bitsa Park between 1992 and 2006, aiming to fill all 64 squares of a chessboard with victims. He primarily targeted elderly homeless men, luring them with the offer of vodka before beating them to death with a hammer and often pushing a vodka bottle into the skull cavity. Pichushkin was arrested in June 2006 after a coworker he killed had written his name on a timed note to be opened if she disappeared. He was convicted of 49 murders in 2007 and sentenced to life imprisonment.