In December 2005 the BWF experimented again with the scoring system, intending both to regulate the playing time and to simplify the system for television viewers. The main change from the traditional system was to adopt rally point scoring, in which the winner of a rally scores a point regardless of who served; games were lengthened to 21 points, with ladies' singles matches now using the same rules as men's singles. There must be at least a two-point difference between scores.