4♣ - ≤ 10 HCP clubs
4♦ - ≤ 10 HCP diamonds
4♥ - 15+ HCP clubs
4♠ - 15+ HCP diamonds
4NT - To Play
5♣ - 11-14 HCP clubs
5♦ - 11-14 HCP diamonds
This page may direct you to a different system to return please click one of these links
Link to 2 Over 1
Link to Montreal Relay
Link to Precision