In 1983, a year before he took on Anatoly Karpov for the World Championship, wentto  Nikic, Yugoslavia to join an all GM category 14 tournament (August 24-September 13 1983). Kasparov took first place with a score of 9 wins,  4 draws and 1 loss (to Boris Spassky).

One particular game versus GM Lajos Portisch of Hungary was given the 1983 Supreme Creative Achievement prize by the USSR Sports Committee

Let me pickup that game after 16.Na5 (see diagram below)

The game received an award because of the way the game finished as follows: