Certified social engineering prevention specialist Egress Software Winn Schwartau Kevin Mitnick World Chess Championship 2006 Bishop and knight checkmate Rook and bishop versus rook endgame World Chess Championship 1890–1891 Fortress (chess) World Chess Championship 2023 Veselin Topalov TCEC Season 17 BE-4 Susan Polgar Hari-namamrta-vyakarana Opposite-colored bishops endgame Vera Menchik Castling Chess endgame Promotion (chess) V. R. Parton Paul Morphy World Chess Championship 2021 Handicap (chess) Swindle (chess) Sahara Net Trams in Belgrade Lucki