This is how the game goes on until one player "knocks," indicating that they think they have enough melds to finish the round. Knocking can happen when a player's unmatchedexpansion slots cards—those that aren't in a meld—have ten points or less. Both players reveal their hands when one knocks, and the points are determined by the number of unmatched cards. The knocker scores the difference if their opponent has more points than they do; if not, the opponent receives the difference plus an additional bonus for undercutting.
