jillybean, on 2021-February-22, 13:10, said:
Unfortunately 1♦ 1M 3♣ is invitational 16+ for us.
I have no idea how you can play that method
Yes, 16-17 hcp two suiters are difficult to bid in standard 2/1, since you basically have to trust partner to keep the bidding alive, after say 1D 1M 2C
However, in real life, he will often take a preference to 2D or rebid his major and, if he passes, often you’ll find that 2C was high enough
Meanwhile, on the very important strong hands, not suited for a 2C opening, you’re screwed.
Obviously nothing’s perfect. Strong club systems are popular, especially with experts, precisely (pun accidental) because of the problems standard methods have with 16-21 hcp 1 level openings
Gazilli or it’s cousins are popular in some circles for the same reason
But absent such methods, I think it is unplayable not to have a strong gf jumpshift available, especially at imps.
Now some play that 1m 1M 2N is an artificial gf. However, when you do that, you’re pretty much forced to play something like 2D showing 18-19 balanced, which is playable but you need agreements about how to proceed after it. Plus of course now you don’t have a bid for whatever you’ve been using 2D to show.
My advice: unless you’re prepared to adopt some gadget or system, perhaps like something mentioned above, keep the jumpshift as gf.
Learn that as responder one keeps the bidding alive with 9 counts, after 1D 1M 2C, unless one has a very bad mesh. I’d pass 2C with something like Qxxx KJxxx x Kxx but that’s about the most I’d ever have and the odds are that I haven’t missed game opposite some 5-5 16 or 17 count even though we have lots of hcp. Is this infallible? No. But you may as well quit the game if you’re hoping for an infallible bidding system😀
Btw, it’s considered normal for responder, with a decent 8+, to give what’s known as a ‘false preference’ to 2D with 2=3 or 3=4 in the minors, to allow opener to bid again (often but not always via a natural 2N) with 16-18. This poses problems for those who like to open 1D on 4=5 minors...which is why I very seldom do,
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari
JillyBean 'Unfortunately 1♦ 1M 3♣ is invitational 16+ for us'
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1♦ - 1♠ - 2♣ is invitational so it makes sense to agree that 1♦ -1♠ - 3♣ is at least F/1. Most partnerships treat jump-shift rebids by opener as G/F. IMO, in a simple natural system, it's a distortion to open 1♣ and reverse into 2♦, especially when the ♦ suit is stronger.