Pallathur Venkatachalam Nandhidhaa (Tamil: பள்ளத்தூர் வெங்கடாசலம் நந்திதா) (born 10 April 1996) is an Indian chess player from the state of Tamil Nadu, who holds the FIDE titles of Woman Grandmaster (WGM) and Woman International Master (WIM).

She scored an unbeaten and impressive 7.5/9 to clinch the title, thereby also qualifying for the Women's Chess World Cup 2023.

She won silver medal in the U-20 World Junior Chess Championship, in 2016 held at Bhubaneswar, Odisha, India.

[2] She won bronze medal in U-14 World Youth Chess Championship held at Halkidiki, Greece in 2010.

[3] In October 2020, she was part of the Indian women chess team along with Vaishali Rameshbabu, Padmini Rout, Bhakti Kulkarni, Mary Ann Gomes which won the Asian Nations (Regions) Online Chess Championship 2020 organised by FIDE.