[csdenmark]

Bocchi-Duboin plays special for 1♣ open and 1NT interference.

For 3rd and 4th seat open handle of 1NT overcalls depends of VULN. I hope to be able to avoid more info from the start opening(already 4 there for 1♣, 1♦, 1NT each, makes 12 lines for 3 openings). This means opening in 3rd seat independently of VULN but handling of 1NT dependent of VULN.

Do I need to have 4 lines for opening in primary openings menu only because of this one specific feature or is there a smarter way? I would like to have a split not until the interference menu.

Here the link: Bocchi-Duboin club 2003