Answer : 1. "Rameshbabu Praggnanand"
Explanation :

Indian young chess player Rameshbabu Praggnanand has defeated world chess champion Ding Liren in the 'Tata Steel Masters' held in Netherlands. With this victory, Praggnananda became the second Indian after Viswanathan Anand to defeat the defending champion. He has also become India's new number one chess player by defeating Anand in terms of live ratings.