Complex sentence: Although the championship was short it was the only one in the history of the Uruguayan league with just 1 round robin format (13 games), due to a calendar conflict with some national and international cups of that year.
Split into simpler sentences: Although the championship was short it was the only one in the history of the Uruguayan league with just 1 round robin format (13 games). This was due to a calendar conflict with some national and international cups of that year.