Players alternately draw cards from the discard or stockpile, trying to get better hands while simultaneously watching what their rivals do. Apart fapk apps downloadrom creating runs & sets, players also need to understand the idea of "knocking.". A player knocks when they think they have a good hand and want to stop the round. However, this can only happen if the total value of unmelded cards in their hand is below a certain threshold, typically 10 points.