Shah reigned supreme on the green baize in the short 150-up format to beat Ireland's Wayne Doyle, England's Aaron Davies, Australia's Grant Meadley and Vietnam's Long Nguyen Thanh and top the Group A.
In the other Indian matches, Arun Agarwal had a mixed outing in the Group C as he defeated Canada's Fraser Durham and Vietnam's Nam Pham Hoai in the morning session before going down the drain against England's Ian Williamson and Australia's Matthew Bolton.
Saurav Kothari won all his four matches in Group I to progress to the next round of the prestigious event. The Kolkata-based cueist defeated Australia's Michael Pearson, Austria's Martin Schmidt, countrymates Aditya Agarwal and Yash Bansal.