Today, we are looking at a game between Viktor Korchnoi and Anatoly Karpov from 1974 in their Candidates Final (game 21). This was won by Korchnoi in 19 moves. Korchnoi is argued to be one of the strongest players in the world that never won the World Championship title. 

1.d4 Nf6 2.Nf3 e6 3.g3 b6 4.Bg2 Bb7 5.c4 Be7 6.Nc3 O-O 7.Qc2 c5 8.d5 exd5 9.Ng5 Nc6 10.Nxd5 g6 11.Qd2 Nxd5 12.Bxd5 Rb8 13.Nxh7 Re8 14.Qh6 Ne5 15.Ng5 Bxg5 16.Bxg5 Qxg5 17.Qxg5 Bxd5 18.O-O Bxc4 19.f4 1-0

https://www.chessgames.com/perl/chessgame?gid=1067831

https://en.wikipedia.org/wiki/Viktor_Korchnoi

http://cassidynoble.com/