Complex sentence: From 2009 onward, it has been held bi-annually and it has been played under a round robin format since 2011, with the title awarded to the leading team on the ladder after all matches are completed.
Split into simpler sentences: From 2009 onward, it has been held bi-annually. It is played under a round robin format since 2011, with the title awarded to the leading team on the ladder after all matches are completed.