A slam convention in which one shows aces and kings with one bid. An ace counts as one point and a king as a 1/2 point.

Responses adhere to the following scale:

5♣ fewer than 11/2 points
5 11/2 points (one ace and one king, or three kings)
5 2 points (two aces, four kings, or one ace and two kings)
5♠ 21/2 points (two aces and one king, or one ace and three kings)
5NT 3 points, etc