Original: On 1 January 2010 the new FIDE rating list was published, and at the age of he became the youngest chess player in history to be ranked world number one, breaking the record previously held by Vladimir Kramnik.
Simplified: On 1 January 2010, the new FIDE rating list was published. He was 19 years and 32 days old when he became the youngest chess player in history to be ranked world number one.