Cyberyeti, on 2020-April-30, 06:40, said:
Do you have agreements about what 1♣-X-1♦-3m means ? I don't know what is standard here, but if they're some sort of splinter showing both majors or distinguish 5-4 from 4-5 then I'm happy.
I have never discussed this particular sequence with my partner, but here is how my reasoning would go:
After this sequence (assuming 1
♣ and 1
♦ natural), we have the following agreements:
pass - any weak hand, or strong hands with no good bid available
X - points and no good bid available. Often 3-3 or 4-3 in the majors.
1
♥ - natural, 4+ hearts and around 6-9 points. Does not deny spades. Lead-directing.
1
♠ - natural, 4+ spades and around 6-9 points. Lead-directing.
1NT - to play, around (8)9-11 points and values in both minors.
2
♣ - an invitational hand (or stronger) with 4+ hearts, 10+ points.
2
♦ - an invitational hand (or stronger) with 4+ spades, 10+ points.
2
♥ - a preemptive raise in hearts, promises at least 5 and about 0-6 points
2
♠ - a preemptive raise in spades, promises at least 5 and about 0-6 points
With that in mind I think it is entirely reasonable to play 2NT, 3
♣ and 3
♦ as different shades of both majors and/or shortness. Without prior discuss ion I think my partner would interpret 2NT as both majors, 3
♣ as a strong offensive hand with hearts (and urgency to put the pressure on, because the strength is based on shape instead of values) and 3
♦ a similar hand but with spades instead. Both these last bids imply shortness somewhere. It sounds better to me to reserve these bids for either locating the shortness or distinguishing 5-4's in the majors, but unfortunately I have never discussed this (but will do so at the next opportunity).