Alexander Pichushkin, also known as The Chessboard Killer, is a Russian serial killer convicted of 48 murders but has since confessed to more.

His end goal? To kill 64 people, one for every square on a chessboard...

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Sources:

Alexander Pichushkin - early life, Murders & Facts - Biography. (n.d.). https://www.biography.com/crime/alexander-pichushkin

Sedlak-Hevener, A. (2022, September 8). 13 unsettling facts about Alexander Pichushkin, the chessboard killer. Ranker. https://www.ranker.com/list/creepy-facts-alexander-pichushkin/amandasedlakhevener

Serena, K. (2022, September 30). This Moscow killer was so obsessed with chess he aimed to slay 64 victims - to match the squares on the Board. All That’s Interesting. https://allthatsinteresting.com/alexander-pichushkin

Wikimedia Foundation. (2023, October 14). Alexander Pichushkin. Wikipedia. https://en.wikipedia.org/wiki/Alexander_Pichushkin