Ignore their ‘X’ except it shuts down any game forcing bid
Specific handling of 1♣ opening or 1♣-1♦ on separate tab
We always have the ‘XX’ at 1 level to show 11+pts
1D-x-xx (no fit and 11+pts)
1M-x-xx (no fit and 11+pts)
Use Jordan 2NT for 11+ HCP and 3+ card fit in a major
Bergen is on after 1st and second seat opening and drury is on after 3rd and 4th seat opening but all other systems switch to 6 8-10
With a take-out double if 1D after partner opens should show 4 card major but don't bid 1NT without 8-11 points to allow partner to repond