This is a tribute to Viktor Lvovich Korchnoi, the Inimitable and Infatiguable, the 'Lion from Leningrad'. Master of aggressive counter-attacking, full of fantasy, with a unique willingness to enter double-edged, unbalanced positions. The iron man of chess who played and beat grandmasters of five generations, from Levenfisch (born 1889) and Lilienthal to Carlsen and Caruana (born 1992), beating a non-surpassed nine undisputed World Champions (including all from Botvinnik to Kasparov), with a persistant search for new ideas and truth at the chess board, winner of more than 220 tournaments, matches and team events. His fresh style and competitive longevity should be an inspiration to us all. Viktor Korchnoi will be remembered for