Top seed Ngyuyen Ngoc Truong Son of Vietnam and G Rohit, Abhijeet Gupta and Rahul Sangma of Inidia won their first round matches in the Under-14 boys section, while top seed Mary Ann Gomes lost her opening encounter in the Under-14 girls' event in the Asian Youth chess championship which began in Kozhikode on Saturday.

Others who won their opening matches in the girls' under-14 category were Luong Nhate Linh (Vietnam), second S Kulkarni, Pallavi Maiya and fourth seed Saheli Nath (all India).

G N Gopal was the other Indian who tasted success in the under-14 boys' category.

In the under-12 section (boys), top seed Le Quang Liem (Vietnam), fourth seed B Adhiba and fifth seed K Narayanan (both India) won their opening rounds, while in the girls' category, top seed Ramya Krishnan, second seed P K Jayashree, third seed Lakshmi Praneetha (all India) and Udan Vindhya Hemanthage (Sri Lanka) scored victories in the first round.

Reigning champion Parimarjan Negi (India) registered an easy win in the under-10 boys' section to be joined by team-mates second seed N Srinath and K Priyadarshan along with Akhila Hemal Ratnayake (Sri Lanka) in the next round.

In the girls' section, Nguyen Ngoc Phoung Khan (Vietnam), Pranali Madhukar Patil, Gundala Madanashree and Rucha S Poojari (all India) won their opening matches.

The week-long championship, in which players from Krygyzstan, Vietnam, Malaysia, Iran, Sri Lanka, Singapore, Mongolia and India are participating, will conclude on June 14.