Although Nur Hazirah ended with just 192 and Sarntong storming home with a superb 242, the 18-year-old Malaysian hung on to win the crown with 1730. The Thai settled for second with 1724, 6 pins away.
Musaab Aladawai, who was third before the final game, had to share third spot with Le Minh Duc, who shot a stunning 258 in his last game on a total of 1698. Chew rounded up the top 5 with 1673. Nur Hazirah pocketed the top prize of 55,000 Thai baht (approx. US$1,600) as champion.
Sarntong earned 28,000 baht while Le and Aladawi shared a total of 14,000 and 7,000 after tieing third position. Singapore's Thaddaeus Mok won the Youth Under-18 Masters title with 1818 in the earlier finaals.
Vietnam's Tran Hoang Khoi captured the Youth Under-15 Masters title with 1342 while Chinese Taipei's Tsai Yu Lun took the Youth Under-13 Masters title with 1137. Qualifying for the Graded and Senior divisions will continue for another two days before their finals on July 25.