In a match of fluctuating fortunes, Chadha started well by winning the opening frame before the Surat cueist Ali grabbed the next two to go ahead 2-1.
Ispreet charged back by easily winning the fourth to draw level at 2-all. Later, Ali and Chadha traded the next two frames, with the former winning a close fifth, and taking the match to the decider.
In another match that went the distance, Mumbai challenger Hasan Badami showed plenty of grit and gumption to overcome Mukund Baradia 4-3, with the frames scores reading 62-69 55-19 53-56 66-31 60-75 71-14 73-27 in his favour, to progress to the third round.
Another Mumbai cueist Rovin D'Souza faced no such problems against Vilas V as he comfortably went on to complete a 4-0 win in another second round match.
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The qualifying tournament is being conducted by BSAM (Billiards and Snooker Association of Maharashtra).
Anas Ali (Surat) beat Ispreet Singh Chadha 4-3; Manav Panchal beat Nitesh Madan 4-1; V Subramanian beat Avenish Shah 4-1; Manish Jain beat Kekoo Nickolson 4-0; Shoaib Khan beat Mayank Bhavsar 4-0; Sunil Jain beat Shabaaz Khan 4-3; Zubin Lelinwala beat Pramod Pole 4-0; Aparjeet Mital beat Pawan K 4-1; Hasan Badami beat Mukund Baradia 4-3.