Complex sentence: A chess prodigy, he achieved the GM title at the age of 14 years, 1 month and 28 days, making him the 7th youngest person to achieve the Grandmaster title in the history of chess.
Split into simpler sentences: A chess prodigy, he achieved the GM title at the age of 14 years, 1 month and 28 days. This puts him as the 7th youngest person to achieve the Grandmaster title in the history of chess.