She was at her best in the Blitz event and won seven games and posted two draws in the nine-round event.
Vaishali drew her final round game against Uurtsaikh Uuriintuya of Mongolia to finish half-a-point ahead of Iran's Sarasdat Khademalsharieh and clinch the gold medal.
Her compatriot Padmini Rout finished third with seven points after a last round win over Yuxin Song of China.
The Chennai player with an ELO rating of 2203 had finished third in the Asian Championship event on Friday.
In the open section, Tamil Nadu's Vr Aravind Chithambaram finished fourth with a tally of seven points. He won six games, drew two and lost one.
M R Lalith Babu (6.5 points), Vidit Santhosh Gujrathi (6.5 points) and B Adhiban (6 points) finished seventh, eighth and 10th respectively.
Gujrathi had won the bronze medal in the Asian Championship (Classical format) yesterday and in the process qualified for the World Cup 2017 to be held in Georgia in September.
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