what were all the match dates?
07/12/2013, 27/10/2013, 06/07/2013, 02/02/2013, 02/12/2012, 06/08/2012, 04/13/2012, 12/17/2011, 12/02/2011, 06/25/2011, 02/19/2011, 09/03/2004, 02/07/2004
and how many rounds were played?
6, 8, 2, 6, 6, 12, 1, 3, 6, 6, 4, 2, 4
now, on which date were the fewest amount of rounds played?
04/13/2012