World Sudoku Grand Prix - Round 6 - India - YouTube
Gold Puzzles Mega Sudoku Book 1: 100 original 12x12 and 16x16 large grid sudoku puzzles by Gp Press | Goodreads
World Puzzle Federation Sudoku Grand Prix 2016
World Puzzle Federation - Results of the Sudoku Grand Prix Finals held on the 18th of October in Bangalore: http://gp.worldpuzzle.org/content/final-results-5 Seungjae Kwak raced ahead after solving an XV Sudoku in around half