Alexander Yuryevich "Sasha" Pichushkin (Russian: Алекса́ндр Ю́рьевич Пичу́шкин, born 9 April 1974), also known as The Chessboard Killer and The Bitsa Park Maniac, is a Russian serial killer. He is believed to have killed at least 49 people, and possibly as many as 60, in southwest Moscow's Bitsa Park, where a number of the victims' bodies were found. Pichushkin is remembered to have been an initially sociable child. However, this changed following an incident in which Pichushkin fell backwards off a swing and was then struck in the forehead as it swung back. Experts have speculated that this event damaged the frontal cortex of Pichushkin's brain; such damage is known to produce poor impulse regulation and a tendency towards aggression. That this event happened when Pichushkin was still a child is also significant, as a child's forehead provides only 1/8 the protection for the brain of an adult's. Indeed, following this accident Pichushkin frequently became ho...