Complex sentence: As with the previous years event, it featured two different tournaments--one for heavyweights (100kg/156-220lbs), the other for middleweights (70 kg/152 lbs), fought under K-1 and K-1 MAX Rules.
Split into simpler sentences: As with the previous years event, it featured two different tournaments, one for heavyweights (100kg/156-220lbs) and the other for middleweights (70 kg/152 lbs). All fights were fought under K-1 and K-1 MAX Rules.