Fujitsu 1993 Teire Incident
Takemiya Masaki, White, played Yang Hui. Move 245 was the last endgame move, after which neutral points were filled alternately. As Takemiya failed to connect his stones (see teire), Yang cut (at P18). However, since Japanese rules were in effect and both knew that Yang had won anyway (B+0.5), they agreed to let White connect.
Here is the game at gobase (you need to have an account there to get through).
First appearance and win of a woman in the Fujitsu Cup.