Complex sentence: Carlsen played for the first time in the Melody Amber blind and rapid chess tournament in Monte Carlo in March; in the 11 rounds he achieved eight draws and three losses in the blindfold, and three wins, seven draws and one loss in the rapid.
Split into simpler sentences: Carlsen played for the first time in the Melody Amber blind and rapid chess tournament in Monte Carlo in March. In the 11 rounds he achieved eight draws and three losses in the blindfold, and three wins, seven draws and one loss in the rapid.