The record for the Youngest to solve 6 x 6 Sudoku puzzles was set by Hitansh Kunal Gohil (born on October 7, 2015) of Mumbai, Maharashtra. He solved 18 Sudoku puzzles (6 x 6) non-stop in 30 minutes and 40 seconds, at the age of 5 years, 2 months and 5 days, as confirmed on December 12, 2020.