She participated several times in the finals of the Bulgarian Women's Chess Championship and won four medals: gold (1976), two silver (1972, 1977) and bronze (1975).

In 1974, she was awarded the FIDE Woman International Master (WIM) title.

Borisova participated twice in the Women's World Chess Championship Interzonal Tournaments: In the following years, in the Women's World Chess Championship Zonal Tournaments she took the third place twice (in 1985, in Eksjö behind Pia Cramling and Nina Høiberg, and in 1987, in Gausdal behind Nina Høiberg and Christina Nyberg), but not winning promotion to the next stage of the Women's World Chess Championship competition.

This biographical article relating to a Bulgarian chess figure is a stub.

You can help Wikipedia by expanding it.This biographical article relating to a Swedish chess figure is a stub.