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Switched unlimited minor openings 1C=3+D, 1D=bal or C

#21 User is offline   straube 

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Posted 2017-December-07, 13:02

It looks like there's difficulty establishing a game force. Also trouble sorting out ranges when responder can be 0+ and opener is strong.

1D-1X, 2C is set up for opener to describe...and consequently opener has pretty much wasted responder's information. If instead 1D-1X, 2C were your strong balanced hand, responder could continue to describe his hand.

Here's a question...do you really want to use your bidding machinery for when opener has a weak NT and responder is very weak (0-5?). You'll occasionally find a better part score, but that's at the cost of being able to pass one of your 1m openings...so maybe not worth it.
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#22 User is offline   dcrc2 

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Posted 2017-December-07, 15:50

View Poststraube, on 2017-December-07, 13:02, said:

1D-1X, 2C is set up for opener to describe...and consequently opener has pretty much wasted responder's information. If instead 1D-1X, 2C were your strong balanced hand, responder could continue to describe his hand.

I don't disagree with that. But I think that if you're happy opening 18-19 balanced at the 1-level, you can just play Polish or Swedish Club. I suppose you might still ask, could we switch the minors around and play "Polish Diamond" instead? But that loses you the opportunity to play 1NT with 18-19 balanced, and I don't really believe that the possible advantages of the switch will make up for that.

But the premise of this system was, what should you do if you decide you want to open 18-19 balanced with 2? I think that's a reasonable choice, due to its effectiveness in competition, even if the constructive sequences are slightly less efficient.

View Poststraube, on 2017-December-07, 13:02, said:

Here's a question...do you really want to use your bidding machinery for when opener has a weak NT and responder is very weak (0-5?). You'll occasionally find a better part score, but that's at the cost of being able to pass one of your 1m openings...so maybe not worth it.

Not especially, no. But it mostly comes for free. I think you must have chosen a bad example, because "opener has a weak NT, responder has 0-5" doesn't actually use up any bidding machinery at all. These hands are bid the same way as if responder had 6-10: there's no need for opener to know the difference.

I'd have said that the bigger problems are when opener has something like 17-20. Then opener's life would be easier, when partner responds, if he could know that this promised some values. But then again, the methods that standard systems have for these situations are rather crude, so I'm not convinced that we're losing much, even if we have to go more slowly to take account of responder's possible 0-5.
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