Eighteen-year-old Indian Grandmaster D Gukesh on Thursday became the youngest world chess champion after beating China's Ding Liren in the 14th and the last game of a roller-coaster showdown that went right down to the wire.

Gukesh secured the requisite 7.5 points as against 6.5 of title-holder Liren, after winning the last classical time control game of the 14-game match that seemed headed for a draw for most part.