giorgis_di, on 2023-October-16, 06:37, said:
Also, in your example would you open 3D with the following hand x xx Kxxxxxx xx? Probably not, and so in that case you still cannot preempt at 5D. On the contrary, by opening 1NT you may be able to do it
Most auctions these days are competitive (approximately 55%-75% of all auctions, depending on who is counting and what the event is). Having some sense of how to have constructive auctions but not competitive auctions will get absolutely crushed in play. Some warning signs include
- Nebulous opening bids (ones that do not name length in a suit or a short list of similar hand types), particularly those that can both have very little playing strength (such as the 12-14 notrump) as well as strong shapely hands.
- Great discrepancy in opening frequencies. Typically in competitive auctions it is best for all low level bids to have near-equal frequency (some people mistakenly believe that higher bids should be significantly less frequent, either halving each step or going down with approximately a factor 1.618, following the Fibonacci sequence. This is nice for constructive auctions but false when we expect the opponents to bid) to convey maximum information should the opponents bid again.
- Multiple hand types in a bid facing which partner should evaluate their hand very differently. In this case your 1♣ contains specific balanced hands, unbalanced hands with long diamonds, and unbalanced hands with long clubs. The value of partner's minor suit holdings in particular varies wildly facing these three hand types, and this will make it near-impossible for partner to accurately judge the value of their hand in competition.
All these problems exist to a great degree over your 1NT opening as well. Since the hands in the opening are so weak the opponents are very likely to make a 2-level overcall, and partner will be in a very tough position without knowing your suit.
It is a classic mistake to write up a lot on constructive auctions and neglect competitive auctions. You are in good company - many system enthusiasts make this mistake. And many of them are easy pickings at the table as a result. Personally I think the focus should be inverted - competitive auctions happen more frequently, and the stakes are generally higher. So it is most important to get them right, and bidding systems should focus primarily on how to deal with competitive auctions, and only secondly with constructive auctions. Put slightly differently, any of a range of modern systems is 'good enough' to get the majority of uninterrupted auctions right, but the competitive agreements are all over the place. I don't really care for your system of continuations of the 1NT opening without competition, but I am very eager to see how you will deal with 1NT-(2♥)-?, and doubly so with 1♣-(1♠)-<something>-(2♠); ?.
Lastly I think your example hand is close between 3♦ and 4♦.