According to the website, the chess bot Filip, who is not such a strong opponent, is not based on Leopold Tyrmand, a chess enthusiast who played in tournaments and wrote a book titled Filip. He may also have had a doppelgänger called Ahmed Adly, who was an Egyptian chess grandmaster who won the World Junior Chess Championship in 2007 and is considered one of the strongest players in the entire Arab world.
Ahmed is Filip but mirrored and color swapped