 Complete the following phrase:  There have been six official maximum breaks in the history of the tournament. The first was made by Ronnie OSullivan in 2011 against Adam Duffy. The second was compiled by Ken Doherty in 2012 against Julian Treiber. This was Dohertys first 147. The third was made in 2014 by Aditya Mehta against Stephen Maguire. Mehta became the first Indian player to compile an official 147. The fourth was made by Thepchaiya Un-Nooh in 2016 The fifth and sixth were made by Michael Georgiou and Jamie Jones on same day in 