Posted 2005-January-11, 14:29
I see no harm in alerting that you open "semi-balanced hands 1NT" and if the opponents ask, tell them what semi-balanced is. I will open some 5422, 5431, and 6322 hands 1NT. I do not open all such hands that fall into my NT range, 1NT. I will also open 1NT with 5332 with a five card major 1NT (not all 5332 hands, but some). Do I have a partnership agreement? Well, on line both misho and henk will know that I open some semi-balanced hands 1NT. Other partners? I guess they will just be surprised. If my hand "looks" like a 1NT opener, I will open it 1NT (or 2NT, or multi 2D balaned) even with what this TD considers non-standard shape. I don;t think I am far from accepted standards on this (some people will not open 1NT with 5 card major, some will not opne with a singleton, some will not open with a six card suit). I even opened 1NT with a six card major once, and if I get the hand again, I will open it again 1NT.
So, when will alerts be required? Well, if your partnership has methods to "catch" a 1NT opener with a five card major (that is, you have PREPARED for it). So, for instance, if you play puppet stayman to 1NT, either the 1NT bid should be alerted, or the puppet stayman alerted (I do not have methods to catch the off-shape 1NT opener with any of my partners).
Now, as for how "rare" is a 1NT opener with 6322 distribution? I put bridgebrowser to this using 2,599,148 hands in the "active" (as opposed to archieved) BBO main room database. Thir represents 162,247 hands if we assume each hand was played 16 times (for main room, a fair assumption).
Of these records, 1NT was the opening bid 298,267 times (which means 1NT was opened 11.44% of the time). Of these 298,267 times, the opener had 6322 distribution 4,733 times. This comes out to be 1.6% of all 1NT opening bids. Now, when you consider that 6322 is rarer than the more balanced patterns, and few people will open 1NT with a six card major, I think this suggest that opening 1NT on 6322 is actually fairly common practice, and should not really be a huge surprise to anyone when it happens. You will see that distribution approxiametly twice for every 100 1NT opening bids against you.
Ben
--Ben--